// first, let's create the function used to do the search

// as you can see in this post I am using ES6(new version of Javascript)

const linearSearch = (arr, query) => {
    let i;
    for (i = 0; i < arr.length; i++) {
      let currentValue = arr[i];
      if (query === currentValue) {
         return i;
      } 
    }
    return -1; 
}

// Hell no!!! what is all of this? don't worry it's simple

javascript
/*
1. First we created a function called linearSearch.
2. We passed two arguments to our function.
3. The first argument is the list we are searching in.
4. The second argument is the value to look for inside the list.
5. We declared a variable called i.
6. Now we want to iterate or (loop) over the list.
7. We are comparing the currentValue on the list to the query argument
8. if they are equal we are returning the index we found the value we were looking for.
9. if not we are returning -1 which means we did not found it.
/*

That's it Enjoy!!!