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JavaScript Easy Calculator

Source: Internet
Author: User
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<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>JS Calculator</title>    <Linkrel= "stylesheet"href= "Http://cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css"></Head><Bodystyle= "margin:50px">    <Divclass= "Form-group">        <Divclass= "Col-sm-3">            <inputtype= "text"ID= "Sum1"class= "Form-control"placeholder= "Please enter first number">        </Div>        <Divclass= "Col-sm-2">            <SelectID= "Sign"class= "Form-control">            <option>Add</option>            <option>Reducing</option>            <option>By</option>            <option>Except</option>            <option>Take surplus</option>        </Select>        </Div>        <Divclass= "Col-sm-3">            <inputtype= "text"ID= "Sum2"placeholder= "Please enter a second number"class= "Form-control">        </Div>        <Divclass= "Col-sm-1">            <ButtonID= "equal"class= "Btn btn-info"style= "width:100%;"onclick= "Equals ()">=</Button>        </Div>        <Divclass= "Col-sm-3">            <labelID= "Count"class= "Form-control"></label>        </Div>    </Div>    <Scripttype= "Text/javascript">        varsum1; varsum2; varSign ; varfruit; functionequals () {sum1=parseint (document.getElementById ("sum1"). Value); Sum2=parseint (document.getElementById ("sum2"). Value); if(IsNaN (sum1)||IsNaN (sum2)) {document.getElementById ("Count"). InnerHTML= "you are not entering a number, please re-enter!"; }Else{ Sign=document.getElementById (" Sign"). Value; Switch(sign) { Case 'Plus': Fruit=sum1+sum2;  Break;  Case 'minus': Fruit=sum1-sum2;  Break;  Case 'Multiply': Fruit=sum1*sum2;  Break;  Case 'except':                        if(sum2== 0) {Fruit= "dividend cannot be 0, please re-enter!";  Break; }Else{Fruit=sum1/sum2;  Break; }                     Case 'Take surplus': Fruit=sum1%sum2;  Break; } document.getElementById ("Count"). InnerHTML=fruit;            }; }    </Script></Body></HTML>

JavaScript Easy Calculator

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