JB Test Calculator


In the realm of web development, creating a functional calculator is a common task. In this article, we will guide you through the process of building a calculator. Whether you’re a beginner or an experienced developer, this step-by-step guide will help you understand the essential components of a basic calculator.

How to Use:

To use the calculator, input your numbers using the provided text fields. The calculator supports basic arithmetic operations, including addition, subtraction, multiplication, and division. After entering your values, click the “Calculate” button to obtain the result.


The underlying formula for the calculator operations is straightforward:

  • Addition: result = num1 + num2
  • Subtraction: result = num1 - num2
  • Multiplication: result = num1 * num2
  • Division: result = num1 / num2

Example Solve:

Let’s walk through an example to demonstrate the calculator’s functionality. Suppose we want to add 15 and 7.

  1. Enter 15 in the first input field.
  2. Enter 7 in the second input field.
  3. Click the “Calculate” button.

The result will be displayed within the form, showing 22 as the sum of 15 and 7.


Q1: Can the calculator handle decimal numbers?

A1: Yes, the calculator can handle both integer and decimal numbers with precision.

Q2: What happens if I input non-numeric characters?

A2: The calculator will handle non-numeric inputs gracefully and display an error message.

Q3: Is there a limit to the size of numbers I can input?

A3: The calculator can handle a wide range of numeric inputs, but extremely large or small numbers may result in scientific notation.


Building a calculator is a fundamental skill for web developers. This tutorial has covered the basics of creating a calculator, including the formula, example solves, and common FAQs. Feel free to customize and enhance the calculator to meet your specific needs.

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