If Else

Conditional branching with if, else if, and else.

Difficulty

Beginner

Code

fn main() {
    let number = 7;
    if number < 0 {
        println!("negative");
    } else if number == 0 {
        println!("zero");
    } else {
        println!("positive");
    }

    let x = if true { 1 } else { 0 };
    println!("x = {}", x);
}

Explanation

if is an expression in Rust. No parentheses needed around conditions.

Key Concepts

• Read the code carefully and understand the data flow
• Try modifying the example to see how it changes behavior
• Run this code in the Rust Playground

Related Topics

Browse more examples in the flow-control category to build a complete understanding of this topic.