&SYS_HLASM_PTF System Variable Symbol
Use &SYS_HLASM_PTF to obtain the PTF level for High Level Assembler. It can be used in open code. &SYS_HLASM_PTF is assigned a read-only value. The value is an 8-character string. This variable is available on z/OS®, z/VM®, z/VSE®, and Linux® on IBM Z®.