I was just trying to write a simple javascript program that will demonstrate to take user input from text field, and clicking the button will display the summation result of those number in another text field. But unfortunately the below code is not working. Clicking the button does not show anything in the result text field.
Add two number using text box as input using javascript
Enter First Number :
Enter Second Number :
Result :
function add_number[]{
var first_number = parseInt[document.getElementsById["Text1"].value];
var second_number = parseInt[document.getElementsById["Text2"].value];
var result = first_number + second_number;
document.getElementById["txtresult"].innerHTML = result;
}
Trilarion
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asked Feb 14, 2015 at 20:49
2
Here a working fiddle: //jsfiddle.net/sjh36otu/
function add_number[] {
var first_number = parseInt[document.getElementById["Text1"].value];
var second_number = parseInt[document.getElementById["Text2"].value];
var result = first_number + second_number;
document.getElementById["txtresult"].value = result;
}
answered Feb 14, 2015 at 20:57
MichelangeloMichelangelo
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2
When you assign your variables "first_number" and "second_number", you need to change
"document.getElementsById" to the singular "document.getElementById".
answered Feb 14, 2015 at 21:06
var first_number = parseInt[document.getElementById["Text1"].value];
var second_number = parseInt[document.getElementById["Text2"].value];
// This is because your method .getElementById has the letter 's': .getElement**s**ById
MeanGreen
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answered Oct 7, 2015 at 11:22
function sum[]
{
var value1= parseInt[document.getElementById["txtfirst"].value];
var value2=parseInt[document.getElementById["txtsecond"].value];
var sum=value1+value2;
document.getElementById["result"].value=sum;
}
Magicprog.fr
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answered Feb 9, 2016 at 10:42
1
You made a simple mistake. Don't worry.... Simply use getElementById instead getElementsById
true
var first_number = parseInt[document.getElementById["Text1"].value];
False
var first_number = parseInt[document.getElementsById["Text1"].value];
Thanks ...
answered Apr 25, 2017 at 13:19
Pullat JunaidPullat Junaid
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var app = angular.module['myApp', []];
app.controller['myCtrl', function[$scope] {
$scope.minus = function[] {
var a = Number[$scope.a || 0];
var b = Number[$scope.b || 0];
$scope.sum1 = a-b;
// $scope.sum = $scope.sum1+1;
alert[$scope.sum1];
}
$scope.add = function[] {
var c = Number[$scope.c || 0];
var d = Number[$scope.d || 0];
$scope.sum2 = c+d;
alert[$scope.sum2];
}
}];
Using Double Negation
First Number:
Second Number:
Minus
Sum: {{ sum1 }}
First Number:
Second Number:
Add
Sum: {{ sum2 }}
answered
Jun 7, 2017 at 9:45
function myFunction[] {
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var x = y + z;
document.getElementById["result"].innerHTML = x;
}
Enter First Number :
Enter Second Number :
Calculate
answered Oct 18, 2019 at 14:12
It should be document.getElementById["txtresult"].value= result;
You are setting the value of the textbox to the result. The id="txtresult" is not an HTML element.
Kos
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answered Feb 13, 2021 at 16:13
var text1 = document.getElementById["Text1"].value;
var text2 = document.getElementById["Text2"].value;
var answer = parseInt[text1] + parseInt[text2];
function add_number[]{
document.getElementById["txtresult"].value = answer;
}
answered Jun 22, 2021 at 11:40
1
its Not document.getElementsById function its document.getElementById try it
sta
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answered Aug 20, 2021 at 5:55
1
Instead of writing
.innerHTML = result;
use
.value = result;
xonya
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answered May 17 at 17:12
Calculator DEMO
Enter Number 1:
Enter Number 2:
+
-
*
/
%
percentage
function resultsum[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var sm = y + z;
document.getElementById["resultsum"].innerHTML = sm;
if[document.getElementById["resultsum"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
function resultsub[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var sb = y - z;
document.getElementById["resultsub"].innerHTML = sb;
{
if[document.getElementById["resultsub"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
}
function resultmul[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var ml = y * z;
document.getElementById["resultmul"].innerHTML = ml;
if[document.getElementById["resultmul"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
function resultdiv[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var dv = y / z;
document.getElementById["resultdiv"].innerHTML = dv;
if[document.getElementById["resultdiv"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
function resultmod[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var md = y + z;
document.getElementById["resultmod"].innerHTML = md;
if[document.getElementById["resultmod"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
function resultper[]
{
var y = parseInt[document.getElementById["txt1"].value];
var z = parseInt[document.getElementById["txt2"].value];
var per = [y + z ]/2;
document.getElementById["resultper"].innerHTML = per;
if[document.getElementById["resultper"].innerHTML%2!=0]
{
alert['"calculated Result is odd"'];
}
else
{
alert['"calculated Result is not "ODD"'];
}
}
answered Jun 3 at 10:36
1
You can simply convert the given number using Number primitive type in JavaScript as shown below.
var c = Number[first] + Number[second];
David Buck
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answered May 10, 2020 at 9:26
How do you add two values in HTML?
You can then add numbers in the first two text boxes and store them in a variable such as "result," as follows: var result = Number[box1. value] + Number[box2. value]; box3.
How do you add two text boxes in HTML?
Here we will create TextBox in HTML 5. We create TextBox by tag with type="type_name" attribute. Like as given below: . . . . First Name.. . Last Name.. .
How do you add a value to a text box?
Open Visual Studio->New Project->Templates->Visual C#->Windows->WindowForm Application. Select WindowForm Application.. Then, give Project Name and Project Location. View->Select ToolBox,Using the Toolbox , Design the Form in Window Applicaton. Click the Textbox Properties and add the TextChanged Event.
How do I multiply two TextBox values in HTML?
The first thing you have got to change is the line with the multiplication. It should be: var myResult = myBox1 * myBox2; You should not use innerHTML with input fields - use value. Additional to that, the onchange event fires only when the input looses the focus.
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