The following built-in Rexx Comparison Functions compare numbers and/or strings and return a value.
|COMPARE||Returns 0 if the two input strings are identical. Otherwise, returns the position of the first character that does not match.|
|DATATYPE||Returns a string indicating the input string is a particular data type, such as a number or character.|
|SYMBOL||Returns this state of the symbol (variable, literal, or bad).|