Find the index of a matching element from an array.

 Get the index of a matching element from an array:

Method 1: using without any method (Original code)-

let cars = ["BMW", "Volvo", "Mini"];

let element = 'Volvo';

for( let i= 0; i <= cars.length; i++){

    if(cars[i] === element){

        console.log(i);

        return i;

    } else {

        console.log(-1);

        return -1;

    }

}

Output: 

1

Method 2: using indexOf  method -

let cars = ["BMW", "Volvo", "Mini"];

let element = 'Volvo';

    if(cars.indexOf(element) == -1){

        console.log("-1");

    } else {

         console.log(cars.indexOf(element));

    }

Output: 

1

Method 3: using indexOf & includes  method -

let cars = ["BMW", "Volvo", "Mini"];

let element = 'Volvo';

    if(!cars.includes(element)){

        console.log("-1");

    } else {

         console.log(cars.indexOf(element));

    }

Output: 

1