var arr = ["1","2","3","4","5"];

function findValueInArrayJQ(array,value) {
  $.each(arr, (index, a) => {
    if(a == value) {
        return true;
    }
  });
  return false;  
}

function findValueInArrayJS(array,value) {
    for(let i = 0; i < array.length; i++) {
    if(array[i] == value)
        return true;
    }
    return false;
}

console.log(findValueInArrayJQ(arr,"1"));
console.log(findValueInArrayJS(arr,"1"));

Output

false
true

As far as I know both of them should give me the same output. Why the first one give me false output?