flag

Lesson in the Go Roadmap · Stage 31: Standard Library

Last updated 14 September 2026

What is flag?

Standard library package for parsing command-line flags. Supports string, int, bool, duration flags with default values and descriptions. Automatically generates help text. Simple API for basic CLI argument parsing before using frameworks like Cobra.

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Free resources to learn flag

flag: common questions

Can I learn flag 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 flag 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 flag tutorial for beginners?

It is lesson 109 of 172 in the free Go roadmap, in stage 31, Standard Library. If you are new to Go, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.