Loop with break in Rust

Introduction

Loops let you repeat actions many times. Sometimes you want to stop the loop early when a condition is met. The break keyword helps you do that.

When you want to keep asking a user for input until they give a valid answer.

When searching through a list and stopping once you find what you need.

When running a game loop that ends when the player loses or wins.

When processing data until a certain condition is true.

When you want to exit an infinite loop safely.

Syntax

Rust

loop {
    // code to repeat
    if condition {
        break;
    }
}

The loop keyword creates an infinite loop.

The break keyword stops the loop immediately.

Examples

This prints "Hello" once and then stops the loop.

Rust

loop {
    println!("Hello");
    break;
}

This loop counts up to 3 but prints only 1 and 2 before breaking.

Rust

let mut count = 0;
loop {
    count += 1;
    if count == 3 {
        break;
    }
    println!("Count is {}", count);
}

Sample Program

This program prints numbers from 1 to 5. When the number reaches 5, the loop stops using break. Then it prints "Loop ended.".

Rust

fn main() {
    let mut number = 1;
    loop {
        println!("Number is {}", number);
        if number == 5 {
            break;
        }
        number += 1;
    }
    println!("Loop ended.");
}

Important Notes

You can use break inside any loop: loop, while, or for.

Using break helps avoid infinite loops when you want to stop early.

Summary

Loops repeat code.

break stops the loop immediately.

Use break to exit loops when a condition is met.