javascript scientific calculator codepen 2022 - HTML Code for Scientific Calculator

Mehedi Hasan

1 May, 2022

HTML Code for Scientific Calculator: scientific calculator code in python scientific calculator in php source code, javascript scientific calculator codepen, scientific calculator code in c++, how to code a scientific calculator, JavaScript code snippet helps you to create a scientific calculator in your HTML projects. It comes with all necessary functions to perform scientific calculations on numbers. Besides addition, subtraction, multiplication, and division, users can also find the the values of exponents, log, natural log (ln), trig functions.

Basically, this scientific calculator built with HTML, CSS, and JavaScript. So, it can be highly customizable with additional CSS to make it according to your needs.

HTML Code for Scientific Calculator

Code Snippet:	User Juicy Scientific Calculator
File Type:	Zip (HTML, CSS, JavaScript)
Author:	Raphael
Official website:	Go to website
Published:	4 months ago
Views:	2,909

Demo Download (6 KB)

javascript scientific calculator codepen 2022

<div class="calculator">
        <input type="text" id="screen" maxlength="20">
        <div class="calc-buttons">

<div class="functions-one">
    <button class="button triggers">C</button>
    <button class="button basic-stuff">(</button>
    <button class="button basic-stuff">)</button>
    <button class="button numbers">7</button>
    <button class="button numbers">8</button>
    <button class="button numbers">9</button>
    <button class="button numbers">4</button>
    <button class="button numbers">5</button>
    <button class="button numbers">6</button>
    <button class="button numbers">1</button>
    <button class="button numbers">2</button>
    <button class="button numbers">3</button>
    <button class="button basic-stuff">±</button>
    <button class="button numbers">0</button>
    <button class="button basic-stuff">.</button>
</div>

<div class="functions-two">
    <button class="button triggers"><=</button>
    <button class="button complex-stuff">%</button>
    <button class="button complex-stuff">x !</button>
    <button class="button complex-stuff">x^</button>
    <button class="button basic-stuff">*</button>
    <button class="button basic-stuff">/</button>
    <button class="button complex-stuff">ln</button>
    <button class="button complex-stuff">e</button>
    <button class="button basic-stuff">+</button>
    <button class="button complex-stuff">x ²</button>
    <button class="button complex-stuff">log</button>
    <button class="button complex-stuff">cos</button>
    <button class="button basic-stuff">-</button>
    <button class="button complex-stuff">√</button>
    <button class="button complex-stuff">sin</button>
    <button class="button complex-stuff">tan</button>
    <button class="button triggers">=</button>
    <button class="button complex-stuff">π</button>
    <button class="button complex-stuff">∘</button>
    <button class="button complex-stuff">rad</button>
</div>
      </div>
</div>

Scientific Calculator style the calculator using the following CSS.

.calculator {
max-width: 530px;
background-color: beige;
padding: 20px;
border-radius: 10px;
margin: 10px auto;
}
input[type=text] {
width: 315px;
    height: 25px;
    border-radius: 5px;
    border: 0px;
    background-color: #333333;
    color: #d9d9d9;
    padding: 0 5px 0 5px;
    margin: 0 0px 10px 84px;

}
.calc-buttons {
    display: flex;
flex-wrap: wrap;
justify-content: space-between;

}
.button {
   margin: 3px;
width: 63px;
border: none;
height: 25px;
border-radius: 4px;
color: #000000;
cursor: pointer;
}
button:hover {
  background-color: hsla(180, 100%, 40%, 0.3);
  transition: .2s;
}
.functions-one {
    width: 210px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
}

.functions-two {
width: 280px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.triggers {
    background-color: #ffc266;
}
.numbers {
    background-color: #999999;
}
.basic-stuff {
    background-color: #80d4ff;
}

.complex-stuff {
    background-color: #80ffff;
}

Scientific Calculator JavaScript program

var display = document.getElementById("screen");
var buttons = document.getElementsByClassName("button");
  
  Array.prototype.forEach.call(buttons, function(button) {
  button.addEventListener("click", function() {
    if (button.textContent != "=" && 
    button.textContent != "C" && 
    button.textContent != "x" && 
    button.textContent != "÷" && 
    button.textContent != "√" && 
    button.textContent != "x ²" && 
    button.textContent != "%" && 
    button.textContent != "<=" && 
    button.textContent != "±" && 
    button.textContent != "sin" && 
    button.textContent != "cos" && 
    button.textContent != "tan" && 
    button.textContent != "log" && 
    button.textContent != "ln" && 
    button.textContent != "x^" && 
    button.textContent != "x !" && 
    button.textContent != "π" && 
    button.textContent != "e" && 
    button.textContent != "rad" 
    && button.textContent != "∘") {
      display.value += button.textContent;
    } else if (button.textContent === "=") {
      equals();
    } else if (button.textContent === "C") {
      clear();
    } else if (button.textContent === "x") {
      multiply();
    } else if (button.textContent === "÷") {
      divide();
    } else if (button.textContent === "±") {
      plusMinus();
    } else if (button.textContent === "<=") {
      backspace();
    } else if (button.textContent === "%") {
      percent();
    } else if (button.textContent === "π") {
      pi();
    } else if (button.textContent === "x ²") {
      square();
    } else if (button.textContent === "√") {
      squareRoot();
    } else if (button.textContent === "sin") {
      sin();
    } else if (button.textContent === "cos") {
      cos();
    } else if (button.textContent === "tan") {
      tan();
    } else if (button.textContent === "log") {
      log();
    } else if (button.textContent === "ln") {
      ln();
    } else if (button.textContent === "x^") {
      exponent();
    } else if (button.textContent === "x !") {
      factorial();
    } else if (button.textContent === "e") {
      exp();
    } else if (button.textContent === "rad") {
      radians();
    } else if (button.textContent === "∘") {
      degrees();
    }
  });
});


function syntaxError() {
  if (eval(display.value) == SyntaxError || eval(display.value) == ReferenceError || eval(display.value) == TypeError) {
    display.value == "Syntax Error";
  }
}


function equals() {
  if ((display.value).indexOf("^") > -1) {
    var base = (display.value).slice(0, (display.value).indexOf("^"));
    var exponent = (display.value).slice((display.value).indexOf("^") + 1);
    display.value = eval("Math.pow(" + base + "," + exponent + ")");
  } else {
    display.value = eval(display.value)
    checkLength()
    syntaxError()
  }
}

function clear() {
  display.value = "";
}

function backspace() {
  display.value = display.value.substring(0, display.value.length - 1);
}

function multiply() {
  display.value += "*";
}

function divide() {
  display.value +=  "/";
}

function plusMinus() {
  if (display.value.charAt(0) === "-") {
    display.value = display.value.slice(1);
  } else {
    display.value = "-" + display.value;
  }
}

function factorial() {
  var number = 1;
  if (display.value === 0) {
    display.value = "1";
  } else if (display.value < 0) {
    display.value = "undefined";
  } else {
    var number = 1;
    for (var i = display.value; i > 0; i--) {
      number *=  i;
    }
    display.value = number;
  }
}

function pi() {
  display.value = (display.value * Math.PI);
}

function square() {
  display.value = eval(display.value * display.value);
}

function squareRoot() {
  display.value = Math.sqrt(display.value);
}

function percent() {
  display.value = display.value / 100;
}

function sin() {
  display.value = Math.sin(display.value);
}

function cos() {
  display.value = Math.cos(display.value);
}

function tan() {
  display.value = Math.tan(display.value);
}

function log() {
  display.value = Math.log10(display.value);
}

function ln() {
  display.value = Math.log(display.value);
}

function exponent() {
  display.value += "^";
}

function exp() {
  display.value = Math.exp(display.value);
}

function radians() {
  display.value = display.value * (Math.PI / 180);
}

function degrees() {
  display.value = display.value * (180 / Math.PI);
}