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C Academy · Lesson

Macros and Inline Functions

Explore macro definitions and their advantages over functions.

1

Macros and Inline Functions

Macros and inline functions help optimize code by reducing function call overhead.

In this lesson, you will learn:

  • How to define and use macros.
  • The benefits of inline functions over macros.
  • How macros and inline functions improve performance.
Macros and Inline Functions — illustration 1

2

What is a Macro?

A macro is a preprocessor directive that replaces code before compilation.

Example:

#define SQUARE(x) (x * x)

Now, SQUARE(5) is replaced with (5 * 5) during compilation.

All lessons in this course

  1. Understanding the C Preprocessor
  2. Macros and Inline Functions
  3. Conditional Compilation
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