Returns the characters for the Unicode code points in the number.
number - a decimal number representing one or more Unicode code points
Data type returned 
Originated in 
FileMaker Pro 10.0
Each group of five digits in the number is treated as a Unicode code point, and the character for each five-digit group is returned in the text.
If the number is 0, the function returns an empty string.
If the number is between 1 and 99,999, the function returns a single character.
If the number contains more than five digits, the function returns the string of characters represented by those code points.
Note  Some Unicode characters can be represented by a single code point or multiple code points. For example, the character ä can be represented by the letter a plus ¨ (dieresis) or by the single character ä. The single code point version of this kind of character is called a precomposed character or a composite character.
Char(0) returns an empty string (“”).
Char(97) returns a.
Char(98) returns b.
Char(9800097) returns ab.
Char(228) returns ä.
Char(77600097) returns ä. In this case the number represents two Unicode characters: the letter a and the dieresis character. When these two characters appear together in a string they are displayed as a single character.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas