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* Exponents can be any positive or negative integer or fractional numerical value inside of parenthesis brackets.
* Exponents can be any positive or negative integer or fractional numerical value inside of parenthesis brackets.
* If the exponent is zero, the value returned is 1.
* If the exponent is zero, the value returned is 1.
* Fractional(or decimal point) exponents MUST be enclosed in '''() brackets''' and will return the fractional exponential root of a value.  
* Fractional(or decimal point) exponents MUST be enclosed in '''() brackets''' and will return the fractional exponential root of a value.
* Exponential operations are done first in the QBasic order of operations.
* Exponential operations are done first in the QBasic order of operations.
* The square root of a number can be returned by the [[SQR]] function or by using an exponent of (1 [[/]] 2). Brackets required.
* The square root of a number can be returned by the [[SQR]] function or by using an exponent of (1 [[/]] 2). Brackets required.
* Values returned may be expressed using exponential or [[Scientific notation]] using '''E''' for SINGLE or '''D''' for DOUBLE precision.
* Values returned may be expressed using exponential or [[Scientific notation]] using '''E''' for SINGLE or '''D''' for DOUBLE precision.
* WARNING: Exponential returns may exceed numerical type limitations and create an [[ERROR Codes|overflow error]]!  
* WARNING: Exponential returns may exceed numerical type limitations and create an [[ERROR Codes|overflow error]]!




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{{CodeStart}}
{{CodeStart}}
 
 
   {{Cl|INPUT}} "Enter a number to calculate it's cube root: ", num$
   {{Cl|INPUT}} "Enter a number to calculate it's cube root: ", num$
   number! = {{Cl|VAL}}(num$)  'gets single number value
   number! = {{Cl|VAL}}(num$)  'gets single number value

Revision as of 03:01, 23 January 2023

The ^ operation raises a numerical value to an exponential value expressing how many times the value is multiplied by itself.


Syntax

return_value = number ^ {whole_exponent|(fractional_exponent)}


Description

  • The number value can be any type literal or variable numerical value.
  • Exponents can be any positive or negative integer or fractional numerical value inside of parenthesis brackets.
  • If the exponent is zero, the value returned is 1.
  • Fractional(or decimal point) exponents MUST be enclosed in () brackets and will return the fractional exponential root of a value.
  • Exponential operations are done first in the QBasic order of operations.
  • The square root of a number can be returned by the SQR function or by using an exponent of (1 / 2). Brackets required.
  • Values returned may be expressed using exponential or Scientific notation using E for SINGLE or D for DOUBLE precision.
  • WARNING: Exponential returns may exceed numerical type limitations and create an overflow error!


Example: Getting the cube root of a number.


  INPUT "Enter a number to calculate it's cube root: ", num$
  number! = VAL(num$)   'gets single number value
  cuberoot# = number! ^ (1 / 3)
  PRINT cuberoot#       'double type variable for accuracy

Details: The value returned will most likely be a SINGLE or DOUBLE value. Make sure that the return variable type matches the likely program operations!


Enter a number to calculate it's cube root: 144
5.241482788417793



See also:

SQR, Mathematical Operations



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