Code Anyway: Rust: Functions

Saturday, June 22, 2024

Rust: Functions

In Rust programming language, functions are defined using the fn keyword. They can take parameters and return values. Let's explore some basic examples to understand how functions work in Rust.

Basic Function Example

Here is a simple function that takes two integers as parameters and returns their sum:


    fn add(x: i32, y: i32) -> i32 {
        return x + y;
    }

    fn main() {
        let result = add(5, 3);
        println!("The sum is: {}", result);
    }

When you run the main function, it will output:


    The sum is: 8

Common Use Cases

Functions in Rust are commonly used for modularizing code, making it easier to maintain and reuse. They are also handy for performing specific tasks and calculations.

Importance in Interviews

Understanding how functions work in Rust is crucial for technical interviews, as many coding challenges and questions revolve around writing efficient and correct functions.