CODEWITHSUNDEEP
javascript
Dede
Dede

Reputation: 55

Need help getting output to show using Javascript

I need to show the output (sum, difference, product, quotient) of the 2 numbers in the span below the form. I have tried many variations but cannot get the sum and etc to show at all. Please help I'm a Javascript noob!!! Thanks!

 function calculate() {
'use strict';

// Read the first text box and convert to a float
var input = document.getElementById('number1').value;
var number1 = parseInt(input);


var input = document.getElementById('number2').value;
var number2 = parseInt(input);


// Calculations 
sum = number1 + number2;
difference = number1 - number2;
product = number1 * number2;
quotient = number1 / number2;

// Display the results in relevant spans
document.getElementById('sum').value = sum;
document.getElementById('difference').value = difference;
document.getElementById('product').value = product;
document.getElementById('quotient').value = quotient;


return false;

} 


function init() {
'use strict';
    document.getElementById('theForm').onsubmit = calculate;
} 
window.onload = init;

HTML

<form action="" method="post" id="theForm">
    <fieldset>
        <div><label for="number1">Number 1</label>
            <input type="text" name="number1" id="number1" required>
        </div>
        <div><label for="number2">Number 2</label>
            <input type="text" name="number2" id="number2" required>
        </div>
        <br />
        <div><input type="submit" value="Calculate"></div>
    </fieldset>
</form>

<span id="sum"></span><br />
<span id="difference"></span><br /> 
<span id="product"></span><br />
<span id="quotient"></span><br />

Upvotes: 0

Views: 143

Answers (1)

thefourtheye
thefourtheye

Reputation: 239523

To assign value to a span tag, we need to use innerHTML property, not value.

document.getElementById('sum').innerHTML = sum;
document.getElementById('difference').innerHTML = difference;
document.getElementById('product').innerHTML = product;
document.getElementById('quotient').innerHTML = quotient;

And Change

<form action="" method="post" id="theForm">

to

<form action="" method="post" id="theForm" onsubmit="return calculate()">

You just have to invoke the calculate function on form's submission.

Upvotes: 1

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