The following built-in Rexx Comparison Functions compare numbers and/or strings and return a value.
| Function | Description |
|---|---|
| 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). |