ASC (statement)

The ASC statement allows a QB64 program to change a character at any position of a STRING variable.

Syntax

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

Description

• 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 error will occur.
• The ASCII replacement code% value can be any INTEGER value from 0 to 255.
• Some ASCII control characters will not PRINT a character or may format the SCREEN. _PRINTSTRING can print them graphically.

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$ 'ABC ASC(a$, 2) = 0 ' CHR$(0) = " " PRINT a$ ASC(a$, 2) = ASC("S") ' get code value from ASC function PRINT a$

ABC A C ASC

See also

• ASC (function)
• MID$ (statement)
• _PRINTSTRING
• INKEY$, ASCII

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