C Tutorial - W3Schools

C Tutorial ❮ Home Next ❯

Learn C

C is a general-purpose programming language that has been widely used for over 50 years.

C is very powerful; it has been used to develop operating systems, databases, applications, etc.

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Examples in Each Chapter

Our "Try it Yourself" editor makes it easy to learn C. You can edit code and view the result in your browser:

Example

#include <stdio.h>int main() { printf("Hello World!"); return 0;} Try it Yourself »

C Exercises

Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

See all C Exercises

What You'll Learn

This tutorial will guide you step by step, with examples and exercises along the way:

• How C programs are structured
• Variables, data types, and operators
• If statements, loops, and arrays
• Functions and how to reuse code
• Pointers and memory
• Structures to organize related data
• Reading from and writing to files
• Organizing programs and build real-life projects

C Quiz

Check your understanding with a short quiz and see how well you know the basics of C.

Start C Quiz

Learn by Examples

Learn by examples! This tutorial supplements all explanations with clarifying examples.

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C Reference

You will also find complete keyword and function references:

Reference Overview C Keywords C stdio Functions C stdlib Functions C string Functions C math Functions C ctype Functions C time Functions ❮ Home Next ❯ ★ +1 Sign in to track progress