javascript - JS search values in the array using loops?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65901390/js-search-values-in-the-array-using-loops

Answer 1

The function expects 2 arguments - arr and value. You pass the value (56) in place of the arr.

In addition, returning in the else means that if the 1st item is not the requested value, the iteration would stop, and return "Not Found".

Pass the array to the function, and return "Not Found" after the loop ends:

function arrayCheck(arr, value) { 
  for (var i = 0; i < arr.length; i++) {
    if (arr[i] === value) {
      return i;
    }
  }
  
  return "Not found";
}

var arr = [35, 56, 78, 90, 54];

console.log(arrayCheck(arr, 56));