How To Write Simple Calculator Program In Javascript

Introduction & Importance

Learning how to write a simple calculator program in JavaScript is an essential step in mastering the language. It helps you understand basic arithmetic operations and data manipulation.

How to Use This Calculator

1. Enter two numbers in the provided fields.
2. Select an operator from the dropdown.
3. Click the “Calculate” button.

Formula & Methodology

The calculator uses basic arithmetic operations to perform calculations based on the selected operator.

Real-World Examples

Example 1

Numbers: 5, 3. Operator: Addition

Result: 8

Data & Statistics

Arithmetic Operations

Operator	Formula
Addition	a + b
Subtraction	a – b
Multiplication	a * b
Division	a / b

Expert Tips

• Always validate user input to prevent errors.
• Use parseFloat to convert string inputs to numbers.
• Handle division by zero to avoid errors.

Interactive FAQ

What is JavaScript?

JavaScript is a high-level, interpreted programming language that is used to make web pages interactive.

Why learn JavaScript?

JavaScript is essential for front-end web development and is used to create dynamic and interactive user interfaces.

For more information, see the W3Schools JavaScript Tutorial.

To learn more about arithmetic operations, visit the Maths is Fun website.