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When you run this program, it produces:
12*-*IF(a>z)|(c<2*d)
>V> "1"
>V> "2"
>O> "0"
>V> "3"
>L> "2"
>V> "4"
>O> "8"
>O> "1"
>O> "1"
*-* THEN
13 *-* SAY 'At least one expression was true.'
>L> "At least one expression was true."
At least one expression was true.
/****************************** REXX ********************************/
/* This program uses the TRACE instruction to show how the language */
/* processor evaluates an expression, operation by operation. */
/********************************************************************/
a=1
z=2
c=3
d=4
TRACE I
IF(a>z)|(c<2*d)THEN
SAY 'At least one expression was true.'
ELSE
SAY 'Neither expression was true.'
Figure 16. Possible Solution
Using Variables and Expressions
Chapter 3. Using Variables and Expressions 31