Table of Contents📚

• the loop keyword♾️
• the break keyword🛑
• the continue keyword➡️

Infinite loop♾️

the loop keyword♾️

Loops allow us to execute a block of code infinitely until we specify when to stop it. For example, we can use the loop keyword to print hello infinitely.

loop {
    println!("Hello 🌍");
}

Output:

Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍
...

the break keyword🛑

The break keyword allows us to stop the execution of a loop.

Imagine that we want to print hello 5 times, and then stop the execution of the loop.

let mut count = 0;

loop {
    println!("Hello 🌍");
    count = count + 1;

    if count == 5 {
        break;
    }
}

We add 1 to the variable count each time we print hello, and then when count is equal to 5, we stop the execution of the loop.

Output:

Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍
Hello 🌍

the continue keyword➡️

The continue keyword allows us to skip the current iteration of the loop and continue with the next one.

ℹ️ an iteration is a single execution of the loop body.

Imagine that we want to print hello 5 times, but we want to skip the second one.

let mut count = 0;

loop {
    count += 1;

    if count == 2 {
        continue;
    }

    println!("Hello, user{} 👋", count);

    if count == 5 {
        break;
    }
}

ℹ️ count += 1 is the same as count = count + 1

We add 1 to the variable count each time we print hello, and then when count is equal to 2, we skip the current iteration and continue with the next one.

Output:

Hello, user1 👋
Hello, user3 👋
Hello, user4 👋
Hello, user5 👋

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