HTML5: How to define the result of a calculation?

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HTML Code:

<!DOCTYPE html><!-- Declaration of the document type as HTML -->
<meta charset="utf-8"><!-- Meta tag specifying character encoding -->
<title> How to define the result of a calculation</title><!-- Title of the HTML document -->
<form <!-- Start of form element -->
oninput="w3resource.value=parseInt <!-- JavaScript code to execute when input changes -->
(input.value)+parseInt                 <!-- Parse input value as integer -->
(output.value)">0                      <!-- Initial value -->
<input type="range" id="input"         <!-- Input field for range selection -->
value="100">100                        <!-- Default range value -->
+<input type="number" id="output"      <!-- Input field for number -->
value="10"><!-- Default number value -->
=<output name="w3resource"             <!-- Output field for displaying result -->
for="input output"></output><!-- Associated inputs for the output -->
</form><!-- End of form element -->


  • This HTML code creates a simple form that allows users to input a number and select a range.
  • The sum of the number input and the range selection is displayed in real-time.
  • Here's the breakdown:
    • The form starts with a declaration and contains various input elements.
    • The JavaScript code inside the oninput attribute calculates the sum of the range input and the number input.
    • The parseInt() function is used to convert the input values from strings to integers for proper addition.
    • The input element with type range allows users to select a value within a specified range.
    • The input element with type number allows users to input a numeric value.
    • The result of the calculation is displayed in the <output> element with the name w3resource.
    • Comments are added before each line of code to explain its purpose.

Live Demo:

See the Pen output-answer by w3resource (@w3resource) on CodePen.

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