toUpperCase() is not making the string upper case

Question

I don\'t know what I\'m doing wrong; But somehow .toUpperCase() String-function is not working on my browser or do I get something wrong?

var string          


        

Answer 1

String is Immutable. Once created, a string object can not be modified.

So here toUpperCase returns a new string, This should work-

var string ="kjsdgfiIJHBVSFIU";
var newString = string.toUpperCase();
alert(newString);