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Break

Part of the Fundamentals section of Coddy's Rust journey — lesson 39 of 75.

The break statement stops the loop instantly when it's encountered.

For example,

for i in 0..10 {
    if i == 6 {
    	break;
	}
	println!("{}", i);
}

In the following example the loop iterates regularly until it reaches number 6. Then the program enters the if statement and executes the break statement. This exits the loop immediately.

The output is:

Challenge

Beginner

You are given a code that prints the numbers from 1 to 20 (including).

Your task is to add if and break statements so that only the numbers from 1 to 15 will be printed, the loop will exit before printing the numbers from 16 to 20.

Cheat sheet

The break statement stops the loop instantly when it's encountered.

for i in 0..10 {
    if i == 6 {
        break;
    }
    println!("{}", i);
}

This loop will print numbers 0 through 5, then exit when i equals 6.

Try it yourself

fn main() {
    for i in 1..=20 {
        println!("{}", i);
    }
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

Rust Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic Operators Modulo Operator Arithmetic Shortcuts Comparison Operators String Comparison

7Basic IO

Printing to Console Reading User Input Recap - Till 120 Recap - True or False

10Variable Bindings

Scope Shadowing Part 1 Variable Binding Shadowing Part 2

13Arrays Continued

Mutable Reference Arrays Array Methods Recap - Product Array Recap - Reversed Array Better Print

16Final Projects

Number Pattern Pattern Finder Student Grade Calculator

2Variables Part 1

Numbers Char String Boolean Mutable Variables

5Operators Part 2

Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3

8Calculator App

Welcome Message Getting Numbers

Project lesson

Basic Operations

Project lesson

Formatted Output

Project lesson

11Functions

Declaring Functions Parameters and Arguments Return Values Multiple Return Values Recap - Sigma Function Recap - Validation Function

14Iterating Over Arrays

Range Guide Enhanced For Loop Borrow In Loop Common Array Operations

3Variables Part 2

Type Declaration Naming Conventions Type Inference Recap - Initialize Variables Type Casting

6Decision Making

If Expressions If-Else Match Statement Recap - If Else Nested If - Else

9Loops

For Over Series While LoopBreakContinue Nested Loop Loop Labels Infinite Loop Recap - Dynamic Input

12Arrays Basics

Declaring Arrays Array as Parameter Accessing Elements Modifying Arrays Recap - Pretty Print Array

15String Operations

String Methods format! Macro String Conversion Recap - Format