A simple calculator coded in JavaScript

Took 19 minutes and 28 seconds to code a simple calculator in JavaScript. Here is the code snippet.

Code (Run Code):

function calculator() {

var operand1 = Number(document.getElementById('operand1').value);

var operator = document.getElementById('operator').value;

var operand2 = Number(document.getElementById('operand2').value);

switch(operator) {

case '+':

text = operand1 + ' + ' + operand2 + ' = ' + (operand1 + operand2);

break;

case '-':

text = operand1 + ' - ' + operand2 + ' = ' + (operand1 - operand2);

break;

case 'x':

case '*':

text = operand1 + ' x ' + operand2 + ' = ' + (operand1 * operand2);

break;

case '/':

text = operand1 + ' / ' + operand2 + ' = ' + (operand1 / operand2);

break;

case '**':

text = operand1 + ' ** ' + operand2 + ' = ' + (operand1 ** operand2);

break;

case '%':

text = operand1 + ' % ' + operand2 + ' = ' + (operand1 % operand2);

break;

default:

text = 'Sorry we could not calculate your equation';

}

if (isNaN(operand1) || isNaN(operand2)) {

text = 'Sorry we could not calculate your equation';

}

document.getElementById('result').innerHTML = text;

}