charCodeAt function to return UTF-16 number in JavaScript

charCodeAt(): getting UTF-16 at given position

By using any char we can get the Unicode number in JavaScript by using charCodeAt().

str='FBA';

document.write(str.charCodeAt(0)); // output 70

In above line the UTF-16 value of first char is returned. ( this is same as Unicode value of single UTF-16 code unit )
Here is an example to generate UTF-16 (same as Unicode ) numbers from a string. We will use string length and for loop to display unicode number of each char of the string.

<script type="text/javascript">
var str='PQRS'; // Sample string

for(var i=0;i<str.length;i++){
document.write(str.charCodeAt(i));
document.write ("<br>");
}
</script>

The Output is here

From UTF-16 to Char

By using String.fromCharCode() we can get back the Char.

Here is the code to get string from UTF-16 (Unicode ).

<script>
document.write(String.fromCharCode(80));
document.write(String.fromCharCode(81));
</script>

Output will be

PQ

From UTF-16 to Char by using String.formCharCode

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