JavaScript .toLowerCase()

The .toLowerCase() method converts a string to lowercase letters in JavaScript.

Syntax

string.toLowerCase();

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Example 1

Converting uppercase letters to lowercase letters:

console.log('HELLO WORLD'.toLowerCase());
// Output: hello world

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Example 2

Don’t forget that .toLowerCase() doesn’t change the original string.

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Codebyte Example

The .toLowerCase() method will convert upper-case alphabet characters to lower-case in a string with other character types such as digits and special characters. Use the below code block to try the method:

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