Daily Quiz - 2024-04-24
console.log([10, 20, 30].indexOf(20));
1
2
-1
20
The answer is Option 1
The indexOf() method in JavaScript returns the first index at which a given element can be found in the array, or -1 if it is not present.
In this case, you’re calling indexOf(20) on the array [10, 20, 30].
The element
20is present in the array.Its index is
1(remember, array indices start from0).So,
console.log([10, 20, 30].indexOf(20));will output1.