Node.js substr() function

Node.js substr() function

Last Updated : 30 Mar, 2023

The substr() function is a string function of Node.js which is used to extract sub-string from the given string.

Syntax:

string.substr(index, length)

Parameters: This function accepts two parameters as mentioned above and described below:

index: This parameter holds the starting index of the specified sub-string.
length: This parameter holds the length of the sub-string.

Return Value: The function returns the sub-string from the given string.

The below programs demonstrate the working of substr() function:

Example 1:

javascript

function findsubstr(str) {
    let substring = str.substr(11, 13);
    console.log(substring);
}
const str = "Welcome to GeeksforGeeks";

findsubstr(str);

Output:

GeeksforGeeks

Example 2:

javascript

function findsubstr(str, index, length) {
    let substring = str.substr(index, length);
    console.log(substring);
}

const str = "Welcome to GeeksforGeeks";
const index = 11, length = 13;

findsubstr(str, index, length);

Output:

GeeksforGeeks

Node.js substr() function

T

Twinkl Bajaj

Improve

Article Tags :

Similar Reads

Node.js trim() function

The trim() function is a string function of Node.js which is used to remove white spaces from the string. Syntax: string.trim() Parameter: This function does not accept any parameter. Return Value: The function returns the string without white spaces. The below programs demonstrate the working of tr

Node.js split() Function

Splitting a string is one of the most widely used functions by the split() method, which splits a string into an array of substrings. This function belongs to the prototype in JavaScript and is applied in many kinds of activities like data parsing from files, extracting information from URLs, or tex

Node.js MySQL SUBSTRING() Function

SUBSTRING() function is a built-in function in MySQL that is used to get a substring of input string between given range inclusive. Syntax: SUBSTRING(input_string, from, length)Parameters: It takes three parameters as follows: input_string: It is the given string for which the substring will be exec

Node.js slice() function

The slice() function is a string function of Node.js which is used to extract sub-string from a string. Syntax: string.slice( start, end ) Parameters: This function uses three parameters as mentioned above and described below: string: It holds the string content. The substring is extracted from this

Node.js pop() function

pop() is an array function from Node.js that is used to remove elements from the end of an array. Syntax: array_name.pop() Parameter: This function does not take any parameter. Return type: The function returns the array. The program below demonstrates the working of the function: Example 1: javascr