ASC

The ASC statement allows a program to change a character at any position of a STRING variable.

Syntax

ASC(stringExpression$[, position%]) = code%

Description

• Note: The statement variant of ASC is not available in QBasic/QuickBASIC, but in QB64 only.
• The stringExpression$ variable's value must have been previously defined and cannot be an empty string ("").
• position% is optional. If no position is used, the leftmost character at position 1 is assumed.
• position% cannot be zero or greater than the string's length or an Illegal function call error will occur.
• The ASCII replacement code% value can be any INTEGER value from 0 to 255.

Examples

Example

Demonstrates how to change existing text characters one letter at a time.

a$ = "YZC" ASC(a$) = 65 ' CHR$(65) = "A" ASC(a$, 2) = 66 ' CHR$(66) = "B" PRINT a$ ASC(a$, 2) = 32 ' CHR$(32) = " " PRINT a$ ASC(a$, 2) = ASC("S") ' get code value from ASC function PRINT a$

ABC A C ASC

See also

• Featured in our "Keyword of the Day" series
• ASC (function)
• MID$, MID$ (function)
• INKEY$, ASCII

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