Any number. This is cast to an integer between 0 and 255. Negative numbers are treated as unsigned 2's complement integers.
A character string with one character which is the character representation of the ASCII value given as the argument.
Gamma> char (65);
"A"
Gamma> char (188);
"¼"
Gamma> char (350.25);
"^"
Gamma> char (-12);
"ô"
Gamma>