Chapter 4. Defining Functions

A function groups statements into a single operation. Functions are the basic unit of organization in a Zig program.

7 items

Section	Title
1	Defining Functions
2	Parameters and Return Values
3	Passing Values
4	Public Declarations
5	Importing Files
6	Organizing a Small Program
7	Exercises

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Defining Functions

A function groups statements into a single operation. Functions are the basic unit of organization in a Zig program.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Parameters and Return Values

Functions communicate through parameters and return values.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Passing Values

When a function is called, values are passed from the caller to the function parameters.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Public Declarations

A Zig program may be split across many files. Declarations can be made visible outside a file with pub.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Importing Files

Large programs are divided into smaller files. Zig uses @import to include declarations from another file.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Organizing a Small Program

A program grows gradually.

Writes › Book › Learn › Learn Zig › Chapter 4. Defining Functions ›

Exercises

1. Write a function max3 that returns the largest of three integers.