How to use substring() and indexOf() Methods In Javascript

In this approach, we are using substring() and indexOf() methods to extract the first word from the string. The substring() method here is used to extract a substring from the beginning of the input string up to that index. The indexOf() method is used to find the index of the first space character in the input string.

Syntax

string.substring(string.indexOf(searchValue, startIndex), endIndex);

Example: In this example, we will be extracting the first word from a string using substring() and indexOf() Methods.

JavaScript

let str = "Geeks For Geeks";
let index = str.indexOf(' ');
let res = 
    str.substring(0, index !== -1 ? 
        index : str.length);
console.log(res);

Output

Geeks

JavaScript Program to Extract First Word from a String

In this article, we have to extract the first word from the input string in JavaScript language. Below is an example for better understanding.

Examples:

Input: Geeks for Geeks
Output: Geeks
Input: I Love India
Output: I

How to use substring() and indexOf() Methods In Javascript

JavaScript Program to Extract First Word from a String

Similar Reads

Contact Us