Use Simple Variables and Formulas

Use Simple Variables and Formulas from (module - Visualforce Basics)

-------------------------------------------------
SOURCE CODE: DisplayUserInfo(Visualforce page)


<apex:page>
    <apex:pageBlock title="User Status">
        <apex:pageBlockSection columns="1">
            {! $User.FirstName }
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:page>