The ASCII table is a representation of the Roman characters as numeric values. Given an ASCII value we may wish to convert it to its corresponding character, or indeed back the other way from character to ASCII value.
To convert an integer variable of ASCII value, myASCII, to a string we use:
myString = char(myASCII)
and to convert back the other way, from a character to the ASCII value, we use
myASCII = asc(myString)
For the ASCII table of characters see the article: ASCII Table of Numbers and Characters.