Welcome folks today in this blog post we will be building a mini arithmetic calculator in html5 css3 and javascript. All the full source code of the application is given below.
Get Started
In order to get started just make a index.html file inside the root directory and copy paste the following code
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calculator</title>
<link rel="stylesheet" href="./main.css">
</head>
<body>
<h1>My Calculator</h1><br/>
<form id="myform" name="calc">
<input name="display" style = "width: 675px;height: 1--px;text-align: center;background-color: darkgray;"><br>
<input type="button" value="0" onclick="calc.display.value+='0'">
<input type="button" value="1" onclick="calc.display.value+='1'" >
<input type="button" value="2" onclick="calc.display.value+='2'">
<input type="button" value="+" onclick="calc.display.value+='+'" style="background-color: lightgreen;"><br/>
<input type="button" value="3" onclick="calc.display.value+='3'">
<input type="button" value="4" onclick="calc.display.value+='4'">
<input type="button" value="5" onclick="calc.display.value+='5'">
<input type="button" value="-" onclick="calc.display.value+='-'" style="background-color: palevioletred;"><br/>
<input type="button" value="6" onclick="calc.display.value+='6'">
<input type="button" value="7" onclick="calc.display.value+='7'">
<input type="button" value="8" onclick="calc.display.value+='8'">
<input type="button" value="x" onclick="calc.display.value+='*'" style="background-color: mediumpurple;"><br/>
<input type="button" value="9" onclick="calc.display.value+='9'">
<input type="button" value="C" onclick="calc.display.value=''" style="background-color: rgb(110, 58, 110);">
<input type="button" value="=" onclick="calc.display.value=eval(calc.display.value)">
<input type="button" value="÷" onclick="calc.display.value+='/'" style="background-color: lightslategrey;">
</form>
<br>
</body>
</html>
Now just make another main.css file inside the root directory and copy paste the following code
main.css
input {
width: 150px;
height: 100px;
font-size: 75px;
border-radius: 10px;
margin: 10px;
background-color: #000;
color: #fff;
border-style: none;
}
#myform {
text-align: center;
margin-top: 20px;
}
h1 {
text-align: center;
font-size: 80px;
margin-top: 20px;
}
Now if you open index.html file inside the browser you will see the following output as shown below
