Length of a String in JavaScript

Length of a string can be calculated by using JavaScript length function. Here is an example of how to get length of a string.

var my_str="Hello world!"
document.write(my_str.length)// 12

Note that the command will count blank space also.

DEMO: Counting data entered by user

<script type="text/javascript">
function check_text1_length(){
var t1=document.getElementById("text1").value;
document.getElementById("msg").innerHTML="The length of data = " + t1.length;
}
</script>

<input type=text name=text1 id=text1>
<input type=button onclick=check_text1_length(); value=Check>
<div id=msg></div>

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Nibedita Sahu	18-01-2011
How to remove blank spaces between two characters using javascript

String Length function in JavaScript

DEMO: Counting data entered by user