expr

An expression evaluation tool.

Description

The expr command is an expression evaluation tool used to evaluate expressions and output the results.

Common operators for expr:

• Addition: +
• Subtraction: -
• Multiplication: \*
• Division: /
• Modulo (Remainder): %

Syntax

expr (options) (parameters)

Options

--help: Display help information for the command.
--version: Display the version information of the command.

Parameters

Expression: The expression to be evaluated.

Examples

result=`expr 2 + 3`
result=$(expr $no1 + 5)