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Swift program to calculate the factorial of a given number using recursion

Here, we are going to learn how to calculate the factorial of a given number using recursion in Swift programming language?
Submitted by Nidhi, on June 25, 2021

Problem Solution:

Here, we will create a recursive function to calculate the factorial of a given number and print the result on the console screen.

Program/Source Code:

The source code to calculate the factorial of a given number is given below. The given program is compiled and executed successfully.

// Swift program to calculate the factorial 
// of a given number using recursion

import Swift 

func calculateFactorial(of number: Int) -> Int {  
    if number == 1 {  
        return 1  
    } else {  
        return number * calculateFactorial(of:number - 1)  
    }  
}  

let fact = calculateFactorial(of: 4)  
print("Factorial: ",fact) 

Output:

Factorial:  24

...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift;

Here, we created a recursive function calculateFactorial() to calculate the factorial of the given number and printed the result on the console screen.

Swift User-defined Functions Programs »

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