The index position of first element in an array is always start with zero. If an element is not present in an array, it returns -1.
The indexOf() method is represented by the following syntax:
element - It represent the element to be searched.
An index of a particular element.
Let's see some simple examples of indexOf() method.
Here, we will print the position of an element.Test it Now
In this example, we will provide the index value from where the search starts.Test it Now
Here, we will search an element which is not present in an array.Test it Now