Converts a number into a character according to the current code table. The number can be a two-digit or three-digit integer number.
Codes greater than 127 may depend on your system's character mapping (for example iso-8859-1, iso-8859-2, Windows-1252, Windows-1250), and hence may not be portable.
Number is a number between 1 and 255 representing the code value for the character.
=CHAR(100) returns the character d.
="abc" & CHAR(10) & "def" inserts a newline character into the string.