Asc

Syntax:

    bytevar= ASC(string, [position] )

Command Availability:

Available on all microcontrollers.

Explanation:

Returns the character code of the character at the specified position in a string.

ASC returns the character code of a particular character in the string. If the string is an ANSI string, the returned value is in the range 0 to 255. This function does NOT support Unicode.

The optional position parameter determines which character is checked. The first character is 1, the second is 2, and so on. If position is omitted, the first character is used.

CHR is the natural complement of ASC — it produces a one-character string corresponding to a given ASCII code.

Note:

If the string passed is null (zero-length), or position is zero or greater than the length of the string, the returned value is 0.

Example:

    charpos = ASC( "ABCD" )     ' Returns 65          ' <<< the ASC instruction, default position

    charpos = ASC( "ABCD", 2 )  ' Returns 66

Key line: ASC( "ABCD" ) — reads the first character by default (position omitted), returning 65, the ASCII code for 'A'.

See Also:

  • Chr — the inverse operation, converting a code back to a character
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