The indexOf() is an inbuilt function in TypeScript which is used to get the index within the calling String object of the first occurrence of the specified value.
Syntax:
string.indexOf(searchValue[, fromIndex])
Parameter: This method accepts two parameter as mentioned above and described below .
- searchValue: This parameter is a string representing the value to search for.
- fromIndex: This parameter is a location within the calling string to start the search from.
Return Value: This method returns the index of the found occurrence, otherwise -1 if not found.
Below example illustrate the String indexOf() method in TypeScriptJS:
Example 1:
JavaScript
<script> // Original strings var str1 = new String('TypeScript | \ String indexOf() Method with example'); // use of String indexOf() Method console.log(str1.indexOf("String")); </script> |
Output:
13
Example 2:
JavaScript
<script> // Original strings var str1 = new String('TypeScript | \ String indexOf() Method with example'); // use of String indexOf() Method console.log(str1.indexOf("Geeks")); </script> |
Output:
-1
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
