JAVASCRIPT

Linear Search Algorithm in javascript

const array = [3, 8, 12, 6, 10, 2];

// Find 10 in the given array.
function checkForN(arr, n) {
    for(let i = 0; i < array.length; i++) {
        if (n === array[i]) {
            return `${true} ${n} exists at index ${i}`;
        }
    }

  return `${false} ${n} does not exist in the given array.`;
}

checkForN(array, 10);

Linear Search Javascript

function linearSearch(array, key){
  for(let i = 0; i < array.length; i++){
    if(array[i] === key) {
        return i;
    }
  }
  return -1;
}

JavaScript Implementation of Linear Search

Set found to false
Set position to −1
Set index to 0
while found is false and index < number of elements
    if list[index] is equal to search value
        Set found to true
        Set position to index
    else Add 1 to index
return position

linear search example js

function linearSearch(arr, item) {
  // Go through all the elements of arr to look for item.
  for (var i = 0; i < arr.length; i++) {
    if (arr[i] === item) { // Found it!
      return i;
    }
  }
  
  // Item not found in the array.
  return null;
}