[LUA 5.1] string.char

Receives zero or more integers and returns a string with length equal to the number of arguments, in which each character has the internal numerical code equal to its corresponding argument.

print(string.char(65,66,67)) -- ABC
print(string.char(76,117,97)) -- Lua
print(string.char()) -- "" (empty string)

Note: Numerical codes are not necessarily portable across platforms.

See the function string.byte for decoding strings to its internal numerical code.