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Sum of even numbers up to using recursive function in JavaScript
We have to write a recursive function that takes in a number n and returns the sum of all even numbers up to n.
Let’s write the code for this function −
Example
const recursiveEvenSum = (num, sum = 0) => { num = num % 2 === 0 ? num : num - 1; if(num){ return recursiveEvenSum(num - 2, sum+num); } return sum; }; console.log(recursiveEvenSum(12)); console.log(recursiveEvenSum(122)); console.log(recursiveEvenSum(23)); console.log(recursiveEvenSum(10)); console.log(recursiveEvenSum(19));
Output
The output in the console will be −
42 3782 132 30 90
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