JavaScript String Object

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The String object is used to manipulate a stored piece of text.

Try it Yourself - Examples


Return the length of a string
How to use the length property to find the length of a string.

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The indexOf() method

How to use the indexOf() method to return the position of the first occurrence of a specified string value in a string.

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Replace characters in a string - replace()

How to use the replace() method to replace some characters with some other characters in a string.

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Complete String Object Reference

For a complete reference of all the properties and methods that can be used with the String object, go to our complete String object reference.
The reference contains a brief description and examples of use for each property and method!


String object

The String object is used to manipulate a stored piece of text.




Examples of use:

The following example uses the length property of the String object to find the length of a string:


var txt="Hello world!";
document.write(txt.length);

The code above will result in the following output:
12

The following example uses the toUpperCase() method of the String object to convert a string to uppercase letters:


var txt="Hello world!";
document.write(txt.toUpperCase());

The code above will result in the following output:
HELLO WORLD!