Expr
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What is 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.
Free resources to learn Expr
More in stage 19: Script Arguments
Expr: common questions
Can I learn Expr in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Expr in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Expr tutorial for beginners?
It is lesson 90 of 166 in the free Shell / Bash roadmap, in stage 19, Script Arguments. If you are new to Shell / Bash, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.