Using Comparison Expressions

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You often use a comparison expression in an IF…THEN…ELSE instruction. The following example uses an IF…THEN…ELSE instruction to compare two values. For more information about this instruction, see section IF…THEN…ELSE Instructions.
Figure 1. Example Using a Comparison Expression
/****************************** REXX *********************************/
/* This program compares what you paid for lunch for two             */
/* days in a row and then comments on the comparison.                */
/*********************************************************************/

PARSE PULL yesterday    /* Gets yesterday's price from input stream */


PARSE PULL today            /*  Gets today's price  */


IF today > yesterday THEN   /* lunch cost increased */
   SAY "Today's lunch cost more than yesterday's."

ELSE            /* lunch cost remained the same or decreased */
   SAY "Today's lunch cost the same or less than yesterday's."

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Timestamp icon Last updated: Tuesday, 7 January 2014


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