JavaScript | String toLowerCase()

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

Syntax:
str.toLowerCase()

Arguments
This function does not take any arguments.

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

Examples for the above function 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 function 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 function 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 function are provided below:

Program 1:

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

Output:

it is a great day.

Program 2:

<script> 
// JavaScript Program to illustrate 
//  toLowerCase() function 
  
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> 

Output:

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

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