ISJCLSYMBOL returns '1'B if the argument is a valid exported JCL symbol. Otherwise it returns '0'B.
>>-ISJCLSYMBOL(x)----------------------------------------------><
- x
- Character expression. Specifies the symbol name to be tested.
When GETJCLSYMBOL returns a null string, you can use the ISJCLSYMBOL built-in function to determine whether it is because the symbol is not an exported JCL symbol or because the symbol has been set to a null string value.