JavaScript String Object

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!

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Special Characters

The backslash (\) can be used to insert apostrophes, new lines, quotes, and other special characters into a string.
Look at the following JavaScript code:

var txt="We are the so-called "Vikings" from the north.";
document.write(txt);

 

In JavaScript, a string is started and stopped with either single or double quotes. This means that the string above will be chopped to: We are the so-called
To solve this problem, you must place a backslash (\) before each double quote in "Viking". This turns each double quote into a string literal:

var txt="We are the so-called \"Vikings\" from the north.";
document.write(txt);

 

JavaScript will now output the proper text string: We are the so-called "Vikings" from the north.
The table below lists other special characters that can be added to a text string with the backslash sign: