JavaScript String toLowerCase() Method

Below is the example of the String toLowerCase() Method.

  • Example:
    filter_none

    edit
    close

    play_arrow

    link
    brightness_4
    code

    <script> 
    function func() { 
        var str = 'GEEKSFORGEEKS'
        var string = str.toLowerCase(); 
        document.write(string); 
    func(); 
    </script> 

    chevron_right

    
    

  • Output:
    geeksforgeeks
    

str.toLowerCase() method converts the entire string to lower case. This method does not affect any of the special characters, digits, and the alphabets that are already in the lower case.

Syntax:

str.toLowerCase()

Return value:
This method returns a new string in which all the upper case letters are converted to lower case.

Examples for the above method are provided below:



Example 1:

var str = 'It iS a Great Day.';
var string = str.toLowerCase();
print(string);

Output:

it is a great day.

In this example, the method toLowerCase() converts all the upper case alphabets into lower case alphabets without affecting the special characters, digits, and all those characters that are already in the lower case.

Example 2:

var str = 'It iS a 5r&e@@t Day.';
var string = str.toLowerCase();
print(string);

Output:

it is a 5r&e@@t day.

In this example the method toLowerCase() converts all the upper case alphabets into lower case alphabets without affecting the special characters, digits and all those characters that are already in lower case.

Codes for the above method are provided below:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

<script>
// JavaScript Program to illustrate
//  toLowerCase() method
  
function func() {
     
    // Original string
    var str = 'It iS a Great Day.';
     
    // Converting to lower case
    var string = str.toLowerCase();
    document.write(string);
}
  
func();
</script>

chevron_right


Output:

it is a great day.

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

<script>
// JavaScript Program to illustrate
//  toLowerCase() method
  
function func() {
     
    //Original string
    var str = 'It iS a 5r&e@@t Day.';
     
    //Converting to lower case
    var string = str.toLowerCase();
    document.write(string);
}
  
func();
</script>

chevron_right


Output:

it is a 5r&e@@t day.

full-stack-img




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.