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:

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:

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
Creates an object from the given key-value pairs
Example:
const tips_objectFromPairs = arr => arr.reduce((a, [key, val]) => ((a[key] = val), a), {}); console.log(tips_objectFromPairs([['x', 2], ['y', 4]]));
Output:
[object Object] { x: 2, y: 4 }
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