To select one of any number of choices, use the SELECT/WHEN/OTHERWISE/END instruction. In a flowchart it appears as follows: The language processor scans the WHEN clauses starting …

Rexx Tutorial - There are two types of conditional instructions. IF/THEN/ELSE can direct the execution of an exec to one of two choices. SELECT/WHEN/OTHERWISE/END can direct the …

REXX expressions can be used in FORM.CALC, FORM.CONDITIONS and FORM.COLUMNS (Column Definition). A valid REXX expression that can be reduced to a 0 or 1. Typically …

All loops, regardless of the type, begin with the DO keyword and end with the END keyword. The simplest loop tells the language processor to repeat a group of instructions a specific number …

2008年8月28日 · So turn to batch, with one truth in your head : REXX is not the best for IO, for reading huge file. You have to know that. So ( don't speak of "browse mode" ) your job has …

2006年8月31日 · Every time you have a "THEN DO", you must have an END to close the "THEN DO". You also need an "END" to close the SELECT. If none of the whens are true, the …

The END instruction signals the end of the SELECT instruction. o If expression1 is false, expression2 is tested. Then, if expression2 is true, instruction2 is run and processing …

2025年1月21日 · In this post, we will explore the syntax of conditional statements, discuss their variations, and provide practical examples to illustrate their use. By the end, you’ll have a clear …

After any of the WHEN conditions is met, the program stops checking, executes a line of code, and skips to the end. You can allow more complex functionality by using DO/END blocks. say …

To execute more than one instruction after the then or else, use a do-end pair, such as: then do . . . end or else do . . . end. To code a branch with no instructions, use the nop instruction.