Generated from C.60.01 /SYS/PUB/CICAT last modified on Thu Jan 11 09:18:52 2001
IF Used to control the execution sequence of a job, UDC or command file. (CM)
IF expression [THEN]
expression Logical expression, consisting of operands and relational operators. The following operators may be incorporated in expression The DO keyword is optional. It may be used or omitted and has no effect. The allowed operands are any variable, integer, string, or Boolean constants, and the MPE/iX reserved words are WARN, FATAL, SYSTEM, and OK. Compound logical expressions can be formed using the And, Not, Xor, and Or logical operators, and nested within parentheses.
IF command up to, but not including, the next ELSE or ENDIF statement. The ELSE or ENDIF must have the same nesting level as the IF statement. Another similar block can follow the ELSE statement. Nesting of the blocks is allowed to 30 levels. The ENDIF statement ends the IF block. The logical expression is evaluated and, if the expression evaluates to true, the IF block is executed; if false, the ELSE block (if one exists) is executed. You may not write an IF construct in such a way that it physically crosses from one User Command (UDCs or command files) to another. o To see a list of expression evaluator functions, type FUNCTIONS at the HELP prompt. Or, you may enter an individual function name for more specific information. o To see a list of FINFO options, type FINFO at the HELP prompt. o To see a list of predefined MPE/iX variables, type VARIABLES at the HELP prompt. Or, you may enter an individual variable name for more specific information. This command may be issued from a session, job, in BREAK, or programmatically. Pressing [Break] terminates the INPUT() function.
The following job listing illustrates the use of an IF statement with ELSE and ENDIF statements !CONTINUE !PASXL MYPROG,MYUSL !IF JCW>=FATAL THEN ! TELL MAC.TECHPUBS;COMPILE FAILED !ELSE ! TELL MAC.TECHPUBS;COMPILE COMPLETED !ENDIF
Commands: CALC, DELETEVAR, ELSEIF, ENDIF, SETJCW, SETVAR, SHOWJCW, SHOWVAR, WHILE; see also FUNCTIONS and VARIABLES Manuals : Appendix B, "Expression Evaluator Functions," of the MPE/iX Commands Reference Manual (32650-90003) Back to Main Index