The JavaScript string has some of the properties of array. You may access a character of the string using index.
In order to find the correct index of a character , you can use <span style="color:#a31d00" class="tadv-color">indexOf()</span> method of string class.
Here is an example program to demonstrate the usage of this method.
<!DOCTYPE html>
<html>
<head>
<title>JS: indexOf Method</title>
<meta charset="utf-8">
</head>
<body>
<script>
var answer = "Lion is the king of Jungle!";
var res = answer.indexOf('king');
console.log(res);
//output = 12
</script>
</body>
</html>The above program will result in 12. The array or string index always start at 0 in JavaScript programming.
The substring ‘king’ starts at index 12. The script goes through all the characters one-by-one and finally reaches the character ‘k’ which is at index 12.