expr in Shell Script Multiplication Example

expr in Shell Script Multiplication Example

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Vinish Kapoor is a seasoned software development professional and a fervent enthusiast of artificial intelligence (AI). His impressive career spans over 20 years, marked by a relentless pursuit of innovation and excellence in the field of information technology. As an Oracle ACE, Vinish has distinguished himself as a leading expert in Oracle technologies, a title awarded to individuals who have demonstrated their deep commitment, leadership, and expertise in the Oracle community.
  • Linux
  • 1 min read

Description

In Shell, expr is known as an all-purpose expression evaluator. Command expr concatenates and assesses the arguments according to the operation given. Operations may be arithmetic, comparison, string, or logical. This tutorial explains how to use expr in a shell script for multiplication with syntax and example.

Syntax

expr expression

expr Multiplication Example

To multiply using expr command use the \* operator. The following example will do multiplication by using the \* operator with expr command.

#!/bin/bash
echo
# Multiplication Example
# ---------- ---------
echo "Multiplication Example"
echo
m=`expr 5 \* 3`
echo "5 * 3 = $m"

Output

Multiplication Example
5 * 3 = 15

See also: