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#REDIRECT [[Assembly language#Macros]]
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A '''conditional assembly language''' is a subset of an [[assembly language]] used to conditionally generate code; it can be used both in a [[Macro (computer science)|macro]] and in open code.
== Example ==
In the conditional assembly language<ref>{{Cite web|date=2015-06-11|title=Conditional assembly language|url=https://www.ibm.com/docs/en/zos/2.2.0?topic=SSLTBW_2.2.0/com.ibm.zos.v2r2.asma400/asmr1021181.htm|access-date=2021-08-29|website=www.ibm.com|language=en-us}}</ref> of the [[IBM High Level Assembler]]{{efn|Much of the language derives from earlier assemblers in, e.g., [[OS/360 and successors]].}} (HLASM)), some important statements are:
* GBLx, LCLx - used to define compile-time variables
* AIF, AGO, ANOP, AEND and AEXIT - used to control the generation of different assembly language statements, depending on the values of compile-time variables and, within macros, on the macro's supplied arguments.
* SETx - used to manipulate compile-time variables.
=== Alternative use ===
The conditional assembler is not restricted to generating assembler code and was used by IBM in the 1970s onwards to generate [[COBOL]] or [[PL/1]] statements for compiling into [[CICS]] application programs.
{{DEFAULTSORT:Conditional Assembly Language}}
[[Category:Assembly languages]]
== Notes ==
{{Notelist}}
== References ==
{{Reflist}}
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