IBM TSO/E REXX User Manual

Using Arithmetic Expressions
You can use arithmetic expressions in an exec many different ways. The following
example uses several arithmetic operators to round and remove extra decimal
places from a dollar and cents value.
Example Using Arithmetic Expressions
/****************************** REXX *******************************/
/* This exec computes the total price of an item including sales */
/* tax rounded to two decimal places. The cost and percent of the */
/* tax (expressed as a decimal number) are passed to the exec when */
/* it is run. */
/*******************************************************************/
PARSE ARG cost percent_tax
total = cost + (cost * percent_tax) /* Add tax to cost. */
price = ((total * 100 + .5) % 1) / 100 /* Round and remove */
/* extra decimal places.*/
SAY 'Your total cost is $'price'.'
Exercises - Calculating Arithmetic Expressions
1. What will the following program display on the screen?
Exercise
/***************************** REXX ****************************/
pa=1
ma=1
kids = 3
SAY "There are" pa + ma + kids "people in this family."
2. What is the value of:
a. 6-4+1
b. 6-(4+1)
c. 6*4+2
d. 6*(4+2)
e. 24%5/2
ANSWERS
1. There are 5 people in this family.
2. The values are as follows:
a. 3
b. 1
c. 26
d. 36
e. 2
Comparison Operators
Expressions that use comparison operators do not return a number value as do
arithmetic expressions. Comparison expressions return either a true or false
response in terms of 1 or 0 as follows:
1 True
0 False
Using Expressions
30
z/OS V1R1.0 TSO/E REXX User’s Guide

IBM TSO/E REXX Specifications

General

Brand	IBM
Model	TSO/E REXX
Category	Computer Hardware
Language	English