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Write a Program of Simple Calculator in JavaScript using HTML.
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Answer Posted / dhanya
<html>
<head>
<title>Simple Javascript Calculator - Basic Arithmetic
Operations</title>
<!-- Aim: Write HTML Code Using JavaScript Functions To
Perform Basic Arithmetic Operations. -->
<!-- 1. Take Two numbers from user say 'Number 1' and
'Number 2'. -->
<!-- 2. Perform Addition, Subtraction, Multiplication,
Division and Modulus. -->
<!-- 3. Result must be displayed on same HTML Page when
respective button is clicked. -->
<!-- 4. Use <input> tag (HTML Forms Concept) with onclick.-->
<!-- 5. Call individual Javascript Function, put them inside
<head> tag only.-->
<!-- 6. Javascript Tutorial/Code For Computer Science
Students. -->
<!-- 7. Tested and Written By (c) Gaurav Akrani. -->
<script language="javascript" type="text/javascript">
function multiply(){
a=Number(document.calculator.number1.value);
b=Number(document.calculator.number2.value);
c=a*b;
document.calculator.total.value=c;
}
</script>
<script language="javascript" type="text/javascript">
function addition(){
a=Number(document.calculator.number1.value);
b=Number(document.calculator.number2.value);
c=a+b;
document.calculator.total.value=c;
}
</script>
<script language="javascript" type="text/javascript">
function subtraction(){
a=Number(document.calculator.number1.value);
b=Number(document.calculator.number2.value);
c=a-b;
document.calculator.total.value=c;
}
</script>
<script language="javascript" type="text/javascript">
function division(){
a=Number(document.calculator.number1.value);
b=Number(document.calculator.number2.value);
c=a/b;
document.calculator.total.value=c;
}
</script>
<script language="javascript" type="text/javascript">
function modulus(){
a=Number(document.calculator.number1.value);
b=Number(document.calculator.number2.value);
c=a%b;
document.calculator.total.value=c;
}
</script>
</head>
<body>
<!-- Opening a HTML Form. -->
<form name="calculator">
<!-- Here user will enter 1st number. -->
Number 1: <input type="text" name="number1">
<!-- Here user will enter 2nd number. -->
Number 2: <input type="text" name="number2">
<!-- Here result will be displayed. -->
Get Result: <input type="text" name="total">
<!-- Here respective button when clicked, calls only
respective artimetic function. -->
<input type="button" value="ADD"
onclick="javascript:addition();">
<input type="button" value="SUB"
onclick="javascript:subtraction();">
<input type="button" value="MUL"
onclick="javascript:multiply();">
<input type="button" value="DIV"
onclick="javascript:division();">
<input type="button" value="MOD"
onclick="javascript:modulus();">
</form>
</body>
</html>
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