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Prabitha SPrabitha S 

how to succesfully execute visualforce programs

Ravikant kediaRavikant kedia
https://www.salesforce.com/us/developer/docs/pages/Content/pages_controller_lifecycle_example.htm
http://www.salesforce.com/us/developer/docs/pages/
http://www.salesforce.com/us/developer/docs/pages/
Page name : firstpage
<apex:page>
      HELLO Prabitha S
</apex:page>

First write visualforce page and then save it and then  copy base url like https://developer.salesforce.com/ and add apex and then your visualforce page name and then enter
Like: https://developer.salesforce.com/apex/firstpage