ASC (Function)

returns a numerical value corresponding to the first character of the string. Where the first character is a common one, e.g. a number, letter, or punctuation symbol, this is the same as the ASCII code number. Where the first character is a graphics symbol or a kana symbol, this is a number given to the symbol by SmileBoom.

gives a.

The opposite of  is  ; the result of   is   (as long as it's an integer between 0 and 255 inclusive), and the result of   is the first character of   (as long as it's not empty).