Rust Functions

Values from a function are returned using return

If return statement is not used, value from the last expression in the function is returned. Semicolon is also not used after the expression

fn addition_2(num1: i32, num2: i32) -> i32 {
    println!("Value of Num1: {}", num1);
    println!("Value of Num2: {}", num2);
 
	// Equivalent: return num1 + num2;
    num1 + num2
}

Multiple values can be returned from a function using tuple

fn addition_2(num1: i32, num2: i32) -> (i32, i32) {
    println!("Value of Num1: {}", num1);
    println!("Value of Num2: {}", num2);
    
    let sum = num1 + num2;
    let difference = num1 - num2;
 
    (sum, difference)
}

All code in Rust is either a statement or a expression
Statements do not return a value