path_Info/Calculator.html at master · bosedipayan/path_Info · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <title> Calculator </title>
        <style>
            .title{
                margin-bottom: 10px;
                text-align: center;
                width: 210px;
                color: blue;
                border: 2px solid black;
            }
            input[type="button"]{
                background-color: black;
                color: white;
                border: 2px solid black;
                width: 100%;
            }
            input[type="text"]{
                background-color: white;
                width: 100%;
                border: 2px solid black;
            }
        </style>
    </head>
    <body>
        <div class="title"> CALCULATOR </div>
        <table>
            <tr>
                <td colspan="3"><input type="text" id="result"></td>
                <td><input type="button" value="c" onclick="clr()"></td>
            </tr>

            <tr>
            <td><input type="button" value="1" onclick="display('1')"></td>
            <td><input type="button" value="2" onclick="display('2')"></td>
            <td><input type="button" value="3" onclick="display('3')"></td>
            <td><input type="button" value="/" onclick="display('/')"></td>
            </tr>
            <tr>
                <td><input type="button" value="4" onclick="display('4')"></td>
                <td><input type="button" value="5" onclick="display('5')"></td>
                <td><input type="button" value="6" onclick="display('6')"></td>
                <td><input type="button" value="-" onclick="display('-')"></td>
            </tr>
            <tr>
                <td><input type="button" value="7" onclick="display('7')"></td>
                <td><input type="button" value="8" onclick="display('8')"></td>
                <td><input type="button" value="9" onclick="display('9')"></td>
                <td><input type="button" value="+" onclick="display('+')"></td>
            </tr>
            <tr>
                <td><input type="button" value="." onclick="display('.')"></td>
                <td><input type="button" value="0" onclick="display('0')"></td>
                <td><input type="button" value="=" onclick="equate('=')"></td>
                <td><input type="button" value="*" onclick="display('*')"></td>
            </tr>
        </table>

        <script type="text/javascript">
           function clr(){
               document.getElementById("result").value = " ";
           }
           function display(val){
               document.getElementById("result").value+=val;
           }
           function equate(){
                let x = document.getElementById("result").value;
                let y = eval(x);

                document.getElementById("result").value = y;
           }
        </script>

    </body>
</html>