JSFiddle - React, Tailwind, and code Playground

by rexonms

JavaScript

// https://www.w3resource.com/javascript-exercises/javascript-recursion-functions-exercises.php
console.clear();


// Recusrion factorial  (n!)
const factorial = (x) => {
	if (x === 0) {
  	return 1;
  }
  return x * factorial(x - 1);
}
console.log(factorial(5));

// Find the greatest common divisor GCD
const gdc = (numA, numB) => {
	if (!numB) {
  	return numA;
  }
	return gdc(numB, numA % numB)
}
console.log(gdc(12, 243446));

// Find integers between two numbers
const range = (startNum, endNum) => {
	if (endNum - startNum === 2) {
  	return [endNum - 1];
  }
  let list = range(startNum, endNum -1);
  list.push(endNum -1);
  return list;
}
console.log(range(1, 5));

// Find sum of an array
const sumOfArray = (list) => {
	if(list.length === 1) {
  	return list[0];
  }
  return list.pop() + sumOfArray(list);
}

console.log(sumOfArray([1,2,3]))

// Exponent of a number
const exponent = (a, n) => {
	if (n === 0) {
  	return 1;
  }
  return a * exponent(a, n -1);
}

console.log(exponent(2, 3));