Expr

expr is a command-line utility used to evaluate expressions. It can perform arithmetic operations, string manipulations, and logical comparisons. The expr command takes arguments as operands and operators, evaluates the expression, and writes the result to standard output. It's often used in shell scripts for performing calculations and making decisions based on numerical or string values.

Visit the following resources to learn more:

• @article@Bash expr with Examples
• @article@Practical examples of “expr” command in Linux
• @video@Linux Tutorial for Beginners | expr command | Evaluate Expressions in Linux