Why Comments Matter in Python: A Beginner’s Guide

Comments are a fundamental part of any programming language, used to explain what the code does and why it was written that way.

In commercial projects they help teammates quickly understand each other's code, and in ongoing development they boost readability and efficiency when revisiting or extending the codebase.

Python provides two comment forms: single‑line comments that start with # and comment out the rest of the line, and multi‑line (block) comments that are enclosed by three single or double quotes ( ''' or """) and can span several lines.

Python’s interpreter completely ignores comments, so they have no impact on program execution.

Example:

# 我是单行注释
'''注释文本'''
"""注释文本"""
"""
第一行
第二行
第三行
"""