To perform arithmetic operations (VF)

<apex:page sidebar="false" controller="arthematic">

<!-- We should create form for inserting data into the text fields-->

<apex:form >

<!-- value atrribure in inputtext is used to set and get the values i.e date enterd in inputbox to controller & controller to vf page-->

<b>Enter value1:</b>&nbsp;&nbsp;<apex:inputText value="{!num1}"/><br/><br/>

<b>Enter value2:</b>&nbsp;&nbsp;<apex:inputText value="{!num2}"/><br/><br/>

<!--commandButton is used to create the button-->

<apex:commandButton value="Sum"/>&nbsp;

<!-- outputText to show the output-->

<apex:outputText value="{!sum}"/><br/><br/>

<apex:commandButton value="Diff"/>&nbsp;

<apex:outputText value="{!diff}"/><br/><br/>

<apex:commandButton value="Mul"/>&nbsp;

<apex:outputText value="{!mul}"/><br/><br/>

</apex:form>

</apex:page>

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APEX CODE

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