How to Find if the Sum of Two Numbers in an Array Equals K in JavaScript?

To find if the sum of two numbers in an array equals a specific number k in JavaScript, you can use nested loops to iterate through the array and check if the sum of two numbers is equal to k.

Here’s an example:

function findSum(arr, k) {
  for (let i = 0; i < arr.length; i++) {
    for (let j = i + 1; j < arr.length; j++) {
      if (arr[i] + arr[j] === k) {
        return true;
      }
    }
  }
  return false;
}

let arr = [10, 15, 3, 7];
let k = 17;

if (findSum(arr, k)) {
  console.log("Sum found");
} else {
  console.log("Sum not found");
}

In this example, the findSum function takes two arguments: an array arr and a number k. The function uses nested loops to iterate through the array and check if the sum of two numbers is equal to k. If a match is found, the function returns true. If no match is found, the function returns false. The code then calls the findSum function with the arr and k values and logs the result to the console.