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rounding numbers and converting to string (hiding scientific notation)
#1
A looong time ago, on the old qb64.org forums, we discussed rounding numbers, and out of it came some functions:

For rounding type _FLOAT:
FUNCTION Round## (num##, digits%)
FUNCTION RoundUp## (num##, digits%)
FUNCTION RoundDown## (num##, digits%)
FUNCTION RoundScientific## (num##, digits%)

For rounding up (DOUBLE, SINGLE):
FUNCTION RoundUpDouble# (num#, digits%)
FUNCTION RoundUpSingle! (num!, digits%)

Convert to string, getting rid of scientific notation (DOUBLE, SINGLE):
FUNCTION DblToStr$ (n#)
FUNCTION SngToStr$ (n!)

From what I recall, they were all working. 
This weekend I dug up the code to use in a new program, 
and added the equivalent rounding and convert-to-string for all 3 types (_FLOAT, DOUBLE, SINGLE):

FUNCTION Round## (num##, digits%)
FUNCTION RoundUp## (num##, digits%)
FUNCTION RoundDown## (num##, digits%)
FUNCTION RoundScientific## (num##, digits%)

FUNCTION RoundDouble# (num#, digits%)
FUNCTION RoundUpDouble# (num#, digits%)
FUNCTION RoundDownDouble# (num#, digits%)
FUNCTION RoundScientificDouble# (num#, digits%)

FUNCTION RoundSingle! (num!, digits%) <- not sure this one works: when digits%=3, it rounds .31 to .32
FUNCTION RoundUpSingle! (num!, digits%)
FUNCTION RoundDownSingle! (num!, digits%)
FUNCTION RoundScientificSingle! (num!, digits%)

FUNCTION DblToStr$ (n#)
FUNCTION SngToStr$ (n!)
FUNCTION FloatToStr$ (n##)

Everything seems to work as expected, except for the function RoundUpSingle!, which for some reason rounds 0.31 to 0.32. 

I've been comparing code and checking everything and am not seeing what is causing this, or whether the problem is in RoundUpSingle! or SngToStr$. 

Maybe a second set of eyes would help... 
If someone could spare a couple minutes to look at this and find what's the wrong, it would be most appreciated!
These functions might come in handy for someone. 

Code: (Select All)
' ################################################################################################################################################################
' Rounding test
' ################################################################################################################################################################

' BOOLEAN CONSTANTS
CONST FALSE = 0
CONST TRUE = NOT FALSE

' GLOBAL VARIABLES a$=string, i%=integer, L&=long, s!=single, d#=double
DIM ProgramPath$: ProgramPath$ = LEFT$(COMMAND$(0), _INSTRREV(COMMAND$(0), "\"))
DIM ProgramName$: ProgramName$ = MID$(COMMAND$(0), _INSTRREV(COMMAND$(0), "\") + 1)

' START THE MAIN PROGRAM
main ProgramName$

' FINISH UP
SYSTEM ' return control to the operating system
PRINT ProgramName$ + " finished."
END

' /////////////////////////////////////////////////////////////////////////////
' Rounding and math.
' http://www.qb64.net/forum/index_PHPSESSID_gulg2aoa966472fnfhjkgp4i35_topic_14266-0/
'
' Rounding up to n decimal places?
' https://www.qb64.org/forum/index.php?topic=3605.0

' Quote from: SMcNeill on May 16, 2017, 06:57:17 pm
' Can also try:
'     INT(number * 100)/100
' Now that worked.
'     STR$(INT(myprice * 100) / 100)
' Perfectly drops all the numbers to 2 decimal places.
' What a relief. Thank you so much and everyone else who gave advice. :)

' Quote from: bplus on Today at 02:13:29 PM
' There is round Keyword check Wiki, might be _round
' you have to add 1/2 of 10 ^ DP to x
' EDIT: crap it's .5 * (1/10^DP)

SUB main (ProgName$)
    DIM RoutineName AS STRING:: RoutineName = "main"
    DIM in$
   
    DIM arrOutput(100, 4) AS STRING
    DIM s1!
    DIM s2!
    DIM d1#
    DIM d2#
    DIM f1##
    DIM f2##
    DIM iLine1 AS INTEGER
    DIM iLine2 AS INTEGER
    DIM iLine3 AS INTEGER
    DIM iLine4 AS INTEGER
    DIM iColumn AS INTEGER
    DIM iMaxLines AS INTEGER
    DIM dp% ' # decimal places
   
    Screen _NewImage(1280, 1024, 32)
   
   
   
   
   
   
   
    CLS
    iTotal = 0
    PRINT "Rounding numbers of type _FLOAT."
    PRINT "Thanks to SMcNeill, bplus, and Pete for your help."
    PRINT
   
    dp% = 2 ' ROUND TO 2 DECIMAL PLACES
   
    ' ROUND FLOAT TO dp% DECIMAL PLACES
    iColumn = 1
    iLine1 = 1: arrOutput(iLine1, iColumn) = "Round## FLOAT TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine1 = 2: arrOutput(iLine1, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR f1## = 0.3 TO 0.4 STEP 0.002
        iLine1 = iLine1 + 1
        f2## = Round##(f1##, dp%)
        arrOutput(iLine1, iColumn) = RightPadString$(FloatToStr$(f1##), 10, " ") + " -> " + RightPadString$(FloatToStr$(f2##), 10, " ")
    NEXT f1##
    iMaxLines = iLine1
   
    ' ROUND FLOAT UP TO 3 DECIMAL PLACES
    iColumn = 2
    iLine2 = 1: arrOutput(iLine2, iColumn) = "RoundUp## FLOAT TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine2 = 2: arrOutput(iLine2, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR f1## = 0.3 TO 0.4 STEP 0.002
        iLine2 = iLine2 + 1
        f2## = RoundUp##(f1##, dp%)
        arrOutput(iLine2, iColumn) = RightPadString$(FloatToStr$(f1##), 10, " ") + " -> " + RightPadString$(FloatToStr$(f2##), 10, " ")
       
        IF iLine2 > iMaxLines THEN
            iMaxLines = iLine2
            arrOutput(iLine2, 1) = ""
        END IF
    NEXT f1##
   
    ' ROUND FLOAT DOWN TO 3 DECIMAL PLACES
    iColumn = 3
    iLine3 = 1: arrOutput(iLine3, iColumn) = "RoundDown## FLOAT TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine3 = 2: arrOutput(iLine3, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR f1## = 0.3 TO 0.4 STEP 0.002
        iLine3 = iLine3 + 1
        f2## = RoundDown##(f1##, dp%)
        arrOutput(iLine3, iColumn) = RightPadString$(FloatToStr$(f1##), 10, " ") + " -> " + RightPadString$(FloatToStr$(f2##), 10, " ")
       
        IF iLine3 > iMaxLines THEN
            iMaxLines = iLine3
            arrOutput(iLine3, 1) = ""
        END IF
    NEXT f1##
   
    ' ROUND FLOAT SCIENTIFIC TO 3 DECIMAL PLACES
    iColumn = 4
    iLine4 = 1: arrOutput(iLine4, iColumn) = "RoundScientific## FLOAT TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine4 = 2: arrOutput(iLine4, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR f1## = 0.3 TO 0.4 STEP 0.002
        iLine4 = iLine4 + 1
        f2## = RoundScientific##(f1##, dp%)
        arrOutput(iLine4, iColumn) = RightPadString$(FloatToStr$(f1##), 10, " ") + " -> " + RightPadString$(FloatToStr$(f2##), 10, " ")
       
        IF iLine4 > iMaxLines THEN
            iMaxLines = iLine4
            arrOutput(iLine4, 1) = ""
        END IF
    NEXT f1##
   
    FOR iLine1 = 1 TO iMaxLines
        PRINT "" + _
            RightPadString$(arrOutput(iLine1, 1), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 2), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 3), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 4), 30, " ")
    NEXT iLine1
   
    PRINT
    INPUT "PRESS <ENTER> TO CONTINUE", in$
   
   
   
   
   
   
   
   
   
   
    CLS
    iTotal = 0
    PRINT "Rounding numbers of type DOUBLE."
    PRINT "Thanks to SMcNeill, bplus, and Pete for your help."
    PRINT
   
    dp% = 2 ' ROUND TO 2 DECIMAL PLACES
   
    ' ROUND DOUBLE TO dp% DECIMAL PLACES
    iColumn = 1
    iLine1 = 1: arrOutput(iLine1, iColumn) = "RoundDouble# TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine1 = 2: arrOutput(iLine1, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR d1# = 0.3 TO 0.4 STEP 0.002
        iLine1 = iLine1 + 1
        d2# = RoundDouble#(d1#, dp%)
        arrOutput(iLine1, iColumn) = RightPadString$(DblToStr$(d1#), 10, " ") + " -> " + RightPadString$(DblToStr$(d2#), 10, " ")
    NEXT d1#
    iMaxLines = iLine1
   
    ' ROUND DOUBLE UP TO 3 DECIMAL PLACES
    iColumn = 2
    iLine2 = 1: arrOutput(iLine2, iColumn) = "RoundUpDouble# TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine2 = 2: arrOutput(iLine2, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR d1# = 0.3 TO 0.4 STEP 0.002
        iLine2 = iLine2 + 1
        d2# = RoundUpDouble#(d1#, dp%)
        arrOutput(iLine2, iColumn) = RightPadString$(DblToStr$(d1#), 10, " ") + " -> " + RightPadString$(DblToStr$(d2#), 10, " ")
       
        IF iLine2 > iMaxLines THEN
            iMaxLines = iLine2
            arrOutput(iLine2, 1) = ""
        END IF
    NEXT d1#
   
    ' ROUND DOUBLE DOWN TO 3 DECIMAL PLACES
    iColumn = 3
    iLine3 = 1: arrOutput(iLine3, iColumn) = "RoundDownDouble# TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine3 = 2: arrOutput(iLine3, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR d1# = 0.3 TO 0.4 STEP 0.002
        iLine3 = iLine3 + 1
        d2# = RoundDownDouble#(d1#, dp%)
        arrOutput(iLine3, iColumn) = RightPadString$(DblToStr$(d1#), 10, " ") + " -> " + RightPadString$(DblToStr$(d2#), 10, " ")
       
        IF iLine3 > iMaxLines THEN
            iMaxLines = iLine3
            arrOutput(iLine3, 1) = ""
        END IF
    NEXT d1#
   
    ' ROUND DOUBLE SCIENTIFIC TO 3 DECIMAL PLACES
    iColumn = 4
    iLine4 = 1: arrOutput(iLine4, iColumn) = "RoundScientificDouble# TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine4 = 2: arrOutput(iLine4, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR d1# = 0.3 TO 0.4 STEP 0.002
        iLine4 = iLine4 + 1
        d2# = RoundScientificDouble#(d1#, dp%)
        arrOutput(iLine4, iColumn) = RightPadString$(DblToStr$(d1#), 10, " ") + " -> " + RightPadString$(DblToStr$(d2#), 10, " ")
       
        IF iLine4 > iMaxLines THEN
            iMaxLines = iLine4
            arrOutput(iLine4, 1) = ""
        END IF
    NEXT d1#
   
    FOR iLine1 = 1 TO iMaxLines
        PRINT "" + _
            RightPadString$(arrOutput(iLine1, 1), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 2), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 3), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 4), 30, " ")
    NEXT iLine1
   
    PRINT
    INPUT "PRESS <ENTER> TO CONTINUE", in$
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
    CLS
    iTotal = 0
    PRINT "Rounding numbers of type SINGLE."
    PRINT "Thanks to SMcNeill, bplus, and Pete for your help."
    PRINT
   
    dp% = 2 ' ROUND TO 2 DECIMAL PLACES
   
    ' ROUND SINGLE TO dp% DECIMAL PLACES
    iColumn = 1
    iLine1 = 1: arrOutput(iLine1, iColumn) = "RoundSingle! TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine1 = 2: arrOutput(iLine1, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR s1! = 0.3 TO 0.4 STEP 0.002
        iLine1 = iLine1 + 1
        s2! = RoundSingle!(s1!, dp%)
        arrOutput(iLine1, iColumn) = RightPadString$(SngToStr$(s1!), 10, " ") + " -> " + RightPadString$(SngToStr$(s2!), 10, " ")
    NEXT s1!
    iMaxLines = iLine1
   
    ' ROUND SINGLE UP TO 3 DECIMAL PLACES
    iColumn = 2
    iLine2 = 1: arrOutput(iLine2, iColumn) = "RoundUpSingle! TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine2 = 2: arrOutput(iLine2, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR s1! = 0.3 TO 0.4 STEP 0.002
        iLine2 = iLine2 + 1
        s2! = RoundUpSingle!(s1!, dp%)
        arrOutput(iLine2, iColumn) = RightPadString$(SngToStr$(s1!), 10, " ") + " -> " + RightPadString$(SngToStr$(s2!), 10, " ")
       
        IF iLine2 > iMaxLines THEN
            iMaxLines = iLine2
            arrOutput(iLine2, 1) = ""
        END IF
    NEXT s1!
   
    ' ROUND SINGLE DOWN TO 3 DECIMAL PLACES
    iColumn = 3
    iLine3 = 1: arrOutput(iLine3, iColumn) = "RoundDownSingle! TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine3 = 2: arrOutput(iLine3, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR s1! = 0.3 TO 0.4 STEP 0.002
        iLine3 = iLine3 + 1
        s2! = RoundDownSingle!(s1!, dp%)
        arrOutput(iLine3, iColumn) = RightPadString$(SngToStr$(s1!), 10, " ") + " -> " + RightPadString$(SngToStr$(s2!), 10, " ")
       
        IF iLine3 > iMaxLines THEN
            iMaxLines = iLine3
            arrOutput(iLine3, 1) = ""
        END IF
    NEXT s1!
   
    ' ROUND SINGLE SCIENTIFIC TO 3 DECIMAL PLACES
    iColumn = 4
    iLine4 = 1: arrOutput(iLine4, iColumn) = "RoundScientificSingle! TO " + _TRIM$(STR$(dp%)) + " PLACES"
    iLine4 = 2: arrOutput(iLine4, iColumn) = RightPadString$("Original", 10, " ") + "    " + RightPadString$("Rounded", 10, " ")
    FOR s1! = 0.3 TO 0.4 STEP 0.002
        iLine4 = iLine4 + 1
        s2! = RoundScientificSingle!(s1!, dp%)
        arrOutput(iLine4, iColumn) = RightPadString$(SngToStr$(s1!), 10, " ") + " -> " + RightPadString$(SngToStr$(s2!), 10, " ")
       
        IF iLine4 > iMaxLines THEN
            iMaxLines = iLine4
            arrOutput(iLine4, 1) = ""
        END IF
    NEXT s1!
   
    FOR iLine1 = 1 TO iMaxLines
        PRINT "" + _
            RightPadString$(arrOutput(iLine1, 1), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 2), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 3), 30, " ") + "    " + _
            RightPadString$(arrOutput(iLine1, 4), 30, " ")
    NEXT iLine1
   
    PRINT
    INPUT "PRESS <ENTER> TO CONTINUE", in$   
   
   
   
END SUB ' main

' /////////////////////////////////////////////////////////////////////////////
' https://www.qb64.org/forum/index.php?topic=3605.0
' Quote from: SMcNeill on Today at 03:53:48 PM
'
' Sometimes, you guys make things entirely too  complicated.
' There ya go!  Three functions to either round naturally,
' always round down, or always round up, to whatever number of digits you desire.
' EDIT:  Modified to add another option to round scientific,
' since you had it's description included in your example.

' Receives + returns _FLOAT myVar## (-1.18E-4932 to +1.18E+4932)

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE _FLOAT

FUNCTION Round## (num##, digits%)
    Round## = INT(num## * 10 ^ digits% + .5) / 10 ^ digits%
END FUNCTION

FUNCTION RoundUp## (num##, digits%)
    RoundUp## = _CEIL(num## * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundDown## (num##, digits%)
    RoundDown## = INT(num## * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundScientific## (num##, digits%)
    RoundScientific## = _ROUND(num## * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE DOUBLE

FUNCTION RoundDouble# (num#, digits%)
    RoundDouble# = INT(num# * 10 ^ digits% + .5) / 10 ^ digits%
END FUNCTION

FUNCTION RoundUpDouble# (num#, digits%)
    RoundUpDouble# = _CEIL(num# * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundDownDouble# (num#, digits%)
    RoundDownDouble# = INT(num# * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundScientificDouble# (num#, digits%)
    RoundScientificDouble# = _ROUND(num# * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE SINGLE

FUNCTION RoundSingle! (num!, digits%)
    RoundSingle! = INT(num! * 10 ^ digits% + .5) / 10 ^ digits%
END FUNCTION

' NOTE: not sure this one works: when digits%=3, it rounds .31 to .32
FUNCTION RoundUpSingle! (num!, digits%)
    RoundUpSingle! = _CEIL(num! * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundDownSingle! (num!, digits%)
    RoundDownSingle! = INT(num! * 10 ^ digits%) / 10 ^ digits%
END FUNCTION

FUNCTION RoundScientificSingle! (num!, digits%)
    RoundScientificSingle! = _ROUND(num! * 10 ^ digits%) / 10 ^ digits%
END FUNCTION


' /////////////////////////////////////////////////////////////////////////////
' Integer to string

FUNCTION cstr$ (myValue)
    'cstr$ = LTRIM$(RTRIM$(STR$(myValue)))
    cstr$ = _TRIM$(STR$(myValue))
END FUNCTION ' cstr$

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

FUNCTION DblToStr$ (n#)
    value$ = UCASE$(LTRIM$(STR$(n#)))
    Xpos% = INSTR(value$, "D") + INSTR(value$, "E") 'only D or E can be present
    IF Xpos% THEN
        expo% = VAL(MID$(value$, Xpos% + 1))
        IF VAL(value$) < 0 THEN
            sign$ = "-"
            valu$ = MID$(value$, 2, Xpos% - 2)
        ELSE
            valu$ = MID$(value$, 1, Xpos% - 1)
        END IF
        dot% = INSTR(valu$, ".")
        L% = LEN(valu$)
        IF expo% > 0 THEN
            add$ = STRING$(expo% - (L% - dot%), "0")
        END IF
        IF expo% < 0 THEN
            min$ = STRING$(ABS(expo%) - (dot% - 1), "0")
            DP$ = "."
        END IF
        FOR n = 1 TO L%
            IF MID$(valu$, n, 1) <> "." THEN
                num$ = num$ + MID$(valu$, n, 1)
            END IF
        NEXT n
    ELSE
        DblToStr$ = value$
        EXIT FUNCTION
    END IF
    DblToStr$ = _TRIM$(sign$ + DP$ + min$ + num$ + add$)
END FUNCTION ' DblToStr$

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

FUNCTION FloatToStr$ (n##)
    value$ = UCASE$(LTRIM$(STR$(n##)))
    Xpos% = INSTR(value$, "D") + INSTR(value$, "E") 'only D or E can be present
    IF Xpos% THEN
        expo% = VAL(MID$(value$, Xpos% + 1))
        IF VAL(value$) < 0 THEN
            sign$ = "-"
            valu$ = MID$(value$, 2, Xpos% - 2)
        ELSE
            valu$ = MID$(value$, 1, Xpos% - 1)
        END IF
        dot% = INSTR(valu$, ".")
        L% = LEN(valu$)
        IF expo% > 0 THEN
            add$ = STRING$(expo% - (L% - dot%), "0")
        END IF
        IF expo% < 0 THEN
            min$ = STRING$(ABS(expo%) - (dot% - 1), "0")
            DP$ = "."
        END IF
        FOR n = 1 TO L%
            IF MID$(valu$, n, 1) <> "." THEN
                num$ = num$ + MID$(valu$, n, 1)
            END IF
        NEXT n
    ELSE
        FloatToStr$ = value$
        EXIT FUNCTION
    END IF
    FloatToStr$ = _TRIM$(sign$ + DP$ + min$ + num$ + add$)
END FUNCTION ' FloatToStr$

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

FUNCTION SngToStr$ (n!)
    value$ = UCASE$(LTRIM$(STR$(n!)))
    Xpos% = INSTR(value$, "D") + INSTR(value$, "E") 'only D or E can be present
    IF Xpos% THEN
        expo% = VAL(MID$(value$, Xpos% + 1))
        IF VAL(value$) < 0 THEN
            sign$ = "-"
            valu$ = MID$(value$, 2, Xpos% - 2)
        ELSE
            valu$ = MID$(value$, 1, Xpos% - 1)
        END IF
        dot% = INSTR(valu$, ".")
        L% = LEN(valu$)
        IF expo% > 0 THEN
            add$ = STRING$(expo% - (L% - dot%), "0")
        END IF
        IF expo% < 0 THEN
            min$ = STRING$(ABS(expo%) - (dot% - 1), "0")
            DP$ = "."
        END IF
        FOR n = 1 TO L%
            IF MID$(valu$, n, 1) <> "." THEN
                num$ = num$ + MID$(valu$, n, 1)
            END IF
        NEXT n
    ELSE
        SngToStr$ = value$
        EXIT FUNCTION
    END IF
    SngToStr$ = _TRIM$(sign$ + DP$ + min$ + num$ + add$)
END FUNCTION ' SngToStr$

' /////////////////////////////////////////////////////////////////////////////
' By sMcNeill from https://www.qb64.org/forum/index.php?topic=896.0

FUNCTION IsNum% (text$)
    DIM a$
    DIM b$
    a$ = _TRIM$(text$)
    b$ = _TRIM$(STR$(VAL(text$)))
    IF a$ = b$ THEN
        IsNum% = TRUE
    ELSE
        IsNum% = FALSE
    END IF
END FUNCTION ' IsNum%

' /////////////////////////////////////////////////////////////////////////////

FUNCTION RightPadString$ (myString$, toWidth%, padChar$)
    RightPadString$ = LEFT$(myString$ + STRING$(toWidth%, padChar$), toWidth%)
END FUNCTION ' RightPadString$

' ################################################################################################################################################################
' #REFERENCE

' =============================================================================
' SOME USEFUL STUFF FOR REFERENCE:

' Type Name               Type suffix symbol   Minimum value                  Maximum value                Size in Bytes
' ---------------------   ------------------   ----------------------------   --------------------------   -------------
' _BIT                    `                    -1                             0                            1/8
' _BIT * n                `n                   -128                           127                          n/8
' _UNSIGNED _BIT          ~`                   0                              1                            1/8
' _BYTE                   %%                   -128                           127                          1
' _UNSIGNED _BYTE         ~%%                  0                              255                          1
' INTEGER                 %                    -32,768                        32,767                       2
' _UNSIGNED INTEGER       ~%                   0                              65,535                       2
' LONG                    &                    -2,147,483,648                 2,147,483,647                4
' _UNSIGNED LONG          ~&                   0                              4,294,967,295                4
' _INTEGER64              &&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    8
' _UNSIGNED _INTEGER64    ~&&                  0                              18,446,744,073,709,551,615   8
' SINGLE                  ! or none            -2.802597E-45                  +3.402823E+38                4
' DOUBLE                  #                    -4.490656458412465E-324        +1.797693134862310E+308      8
' _FLOAT                  ##                   -1.18E-4932                    +1.18E+4932                  32(10 used)
' _OFFSET                 %&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    Use LEN
' _UNSIGNED _OFFSET       ~%&                  0                              18,446,744,073,709,551,615   Use LEN
' _MEM                    none                 combined memory variable type  N/A                          Use LEN

' div: int1% = num1% \ den1%
' mod: rem1% = num1% MOD den1%


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rounding numbers and converting to string (hiding scientific notation) - by madscijr - 07-18-2022, 05:40 PM



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