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JavaScript: Calculate the factorial of a number

JavaScript Function: Exercise-1 with Solution

Write a JavaScript program to calculate the factorial of a number.

In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120

Pictorial Presentation:

JavaScript: Calculate the factorial of a number

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Calculate the factorial of a number.</title>
</head>
<body>
</body>
</html>

JavaScript Code:

function factorial(x) 
{ 

  if (x === 0)
 {
    return 1;
 }
  return x * factorial(x-1);
         
}
console.log(factorial(5));

Output:

120

Flowchart:

Flowchart: JavaScript recursion function- Calculate the factorial of a number

Live Demo:

See the Pen javascript-recursion-function-exercise-1 by w3resource (@w3resource) on CodePen.


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Previous: Javascript Recursion Functions Exercises
Next: Write a JavaScript program to find the greatest common divisor (gcd) of two positive numbers.

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JavaScript: Tips of the Day

Using the window.location object

JavaScript can access the current URL using the window.location object. Pretty neat, but even cooler is that this object contains certain parts of the URL as well.
Get access to the protocol/host/pathname/search/and more!

// JavaScript can access the current URL in parts. For this URL:
'https://thatsanegg.com/example/index.html?s=article'
window.location.protocol == 'https:'
window.location.host == 'thatsanegg.com'
window.location.pathname == '/example/index.html'
window.location.search == '?s=article'

Ref: https://bit.ly/2LBj213