Scientific_Calculator/scientific_calculator.html at main · Ritika-Nunia/Scientific_Calculator · GitHub

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<html>
    <head>
        <title>ScientificCalculator</title>
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
        <link rel="stylesheet" href="Scientific_Calculator.css">
    </head>
    <body>
        <table class="center">
            <tr>
            <td colspan="6"><input type="text"  id="input" onkeypress="return /[0-9.]/i.test(event.key)"></td>
            </tr>
            <tr>
              <td><input type="button" id="btn" value="pow" onclick="pow()"></td>
              <td><input type="button"id="btn"  value="H" onclick="display(value)"></td>
              <td><input type="button" id="btn" value="%" onclick="percent()"></td>
              <td><input type="button" id="btn" value="<--" onclick="backspace()"></td>
              <td colspan="2"><input type="button" id="btn" value="AC" onclick="allclear()"></td>
            </tr>
            <tr>
                <td><input type="button" id="btn" value="log" onclick="log()"></td>
                <td><input type="button" id="btn" value="sin" onclick="sin()"></td>
                <td><input type="button" id="btn" value="7" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="8" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="9" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="/" onclick="display(value)"></td>
            </tr>
            <tr>
                <td><input type="button" id="btn" value="n!" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="cos" onclick="cos()"></td>
                <td><input type="button" id="btn" value="4" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="5" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="6" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="*" onclick="display(value)"></td>
            </tr>
            <tr>
                <td><input type="button" id="btn" value="e" onclick="exponential()"></td>
                <td><input type="button" id="btn" value="tan" onclick="tan()"></td>
                <td><input type="button" id="btn" value="1" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="2" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="3" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="-" onclick="display(value)"></td>
            </tr>
            <tr>
                <td><input type="button" id="btn" value="sqrt" onclick="squareroot()"></td>
                <td><input type="button" id="btn" value="pi" onclick="pi()"></td>
                <td><input type="button" id="btn" value="0" onclick="display(value)"></td>
                <td><input type="button" id="btn" value="." onclick="display(value)"></td>
                <td><input type="button" id="btn" value="=" id="enter" onclick="calculate()"></td>
                <td><input type="button" id="btn" value="+" onclick="display(value)"></td>
            </tr>

          </table>
          <script>
              function display(digit){
                  var inputdigit=document.getElementById("input")
                  inputdigit.value+=digit
                  console.log(inputdigit.value)
              }
              function calculate(){
                  var string = document.getElementById("input").value;
                  var cal = eval(string);
                  document.getElementById("input").value=cal
                  window.addEventListener("keydown",checkKeyPress, false);
                   function checkKeyPress(key){
                       if(key.keyCode=="13"){
                           var string = document.getElementById("input").value;
                           var cal = eval(string);
                           document.getElementById("input").value=cal


                        }
                    }
                }
              function sin(){
                var string = document.getElementById("input").value;
                var sinval=Math.sin(string);
                document.getElementById("input").value=sinval
            }
            function cos(){
                var string = document.getElementById("input").value;
                var cosval=Math.cos(string);
                document.getElementById("input").value=cosval
            }
            function tan(){
                var string = document.getElementById("input").value;
                var tanval=Math.cos(string);
                document.getElementById("input").value=tanval
            }
            function pi(){
                var string = document.getElementById("input").value;
                var pival=string*3.14159;
                document.getElementById("input").value=pival;
            }
            function log(){
                var string = document.getElementById("input").value;
                var logval= Math.log(string);
                document.getElementById("input").value=logval

            }
            function pow(){
                var string = document.getElementById("input").value;
                var powval= Math.pow(string);
                document.getElementById("input").value=powval

            }
            function percent(){
                var string = document.getElementById("input").value;
                var percentval=
                document.getElementById("input").value=percentval

            }
            function squareroot(){
                var string = document.getElementById("input").value;
                var sqrtval= Math.sqrt(string)
                document.getElementById("input").value=sqrtval

            }
            function exponential(){
                var string = document.getElementById("input").value;
                var expval= Math.exp(string);
                document.getElementById("input").value=expval;
            }
            function allclear(){
                document.getElementById("input").value =  "";
            }
            function backspace(){
                var lastvalue = document.getElementById("input").value;
                document.getElementById("input").value = lastvalue.substr(0,  lastvalue.length - 1);


            }


       </script>
    </body>
</html>