Asking about the error occured in DateFormat in sapui5

Hi all,

I am trying to get the current date and time using "DateFormat" function available in sapui5.. below is the code I used

var dateFormat = sap.ui.core.format.DateFormat.getDateInstance({pattern:"dd/MM/yyyy"});

var timeformat= sap.ui.core.format.DateFormat.getTimeInstance({pattern:"KK:mm:ss a"});

console.log(timeformat);

console.log(dateFormat);

and the error is.. Uncaught error: cannot read property 'DateFormat' undefined..

I have included the sap.ui.core library in index.html.. eventhen I am getting the same error..

please provide me the solution.. thank you..