JavaScript - String concat() method

In this post, we will discuss about concat() method in JavaScript. concat() is a method used to append the parent string with given string.

Let us create the String for demonstration.

Copied

let str='student who gets first marks that student will be eligible for scholarship';
console.log(str);

Output:

student who gets first marks that student will be eligible for scholarship

String concat():

concat() used to append the given string with its parent string but it will return the new string by appending but will not change the parent string.

concat() syntax:

Copied

String.concat('stringtoappend')

Where, String is a parent string and 'stringtoappend' is the given string to append with parent string.

concat() example 1:

create a string declaration with sentence and append the declared string with the given string.

Copied

let str='student who gets first marks that student will be eligible for scholarship';
console.log('parent string = '+str);
let appendString = ' with scholarship less worried about money'
let concatenatedString = str.concat(appendString);
console.log('parent string = '+str);
console.log('concatenated string = '+ concatenatedString);

Execution Steps:

1. Copy the above example code.
2. Open the browser(chrome or Microsoft edge) and press(ctrl+shift+I).
3. Go to the console tab.
4. Paste the copied code into the console and press enter button.

Output:

parent string = student who gets first marks that student will be eligible for scholarship
parent string = student who gets first marks that student will be eligible for scholarship
concatenated string = student who gets first marks that student will be eligible for scholarship with scholarship less worried about money

concat string with '+' example:

In this example, we will append the string with parent string using '+' operator.

Copied

    let str='student who gets first marks that student will be eligible for scholarship';
    console.log('parent string = '+str);
    let appendString = ' with scholarship less worried about money'
    let concatenatedString = str + appendString;
    console.log('parent string = '+str);
    console.log('concatenated string = '+concatenatedString);

Execution Steps:

1. Copy the above example code.
2. Open the browser(chrome or Microsoft edge) and press(ctrl+shift+I).
3. Go to the console tab.
4. Paste the copied code into the console and press enter button.

Output:

parent string = student who gets first marks that student will be eligible for scholarship

parent string = student who gets first marks that student will be eligible for scholarship

concatenated string = student who gets first marks that student will be eligible for scholarship with scholarship less worried about money