Home » Rust » Rust Programs

Rust program to calculate the factorial using recursion

Rust | Factorial using Recursion: Write a program to find the factorial of a given number using recursion.
Submitted by Nidhi, on October 10, 2021

Problem Solution:

In this program, we will create a recursive function to calculate the factorial of the given number and print the result.

Program/Source Code:

The source code to calculate factorial using recursion is given below. The given program is compiled and executed successfully.

// Rust program to calculate the 
// factorial using recursion

fn factorial(num:i32)->i32 {
	if num == 1 {
		return 1
	} else {
		return num * factorial(num-1)
	}
}

fn main() {
    let res = factorial(5);
    println!("Factorial is: {}",res);
}

Output:

Factorial is: 120

Explanation:

In the above program, we created two functions factorial() and main(). The factorial() function is a recursive function, which is used to calculate the factorial of the given number.

In the main() function, we called the factorial() function and printed the result.

Rust Functions Programs »

---