Calculator in JavaScript
Introduction to Calculator in JavaScript
Calculator in JavaScript is a beginner-friendly project that helps you apply core concepts in a real-world application. In this JavaScript course for beginners, you will learn how to build a simple calculator in JavaScript using DOM and events.
To understand this project better, you should first learn operators in JavaScript and events in JavaScript. If you want to continue learning step by step, you can click here for free courses and explore the complete JavaScript course.
What is Calculator in JavaScript
Calculator in JavaScript is a web-based application that performs basic arithmetic operations like addition, subtraction, multiplication, and division.
Features of Calculator in JavaScript
- Perform basic calculations
- Take user input
- Display results instantly
- Clear and reset functionality
HTML Structure for Calculator
<button onclick=“appendValue(‘1’)“>1</button>
<button onclick=“appendValue(‘2’)“>2</button>
<button onclick=“appendValue(‘3’)“>3</button>
<button onclick=“appendValue(‘+’)“>+</button>
<button onclick=“calculate()“>=</button>
<button onclick=“clearDisplay()“>C</button>
JavaScript Code for Calculator
function appendValue(value) {
display.value += value;
}
function calculate() {
display.value = eval(display.value);
}
function clearDisplay() {
display.value = “”;
}
How Calculator in JavaScript Works
User Input
Users click buttons to enter numbers and operators.
Perform Calculation
The calculator evaluates the expression and shows the result.
Clear Function
The clear button resets the display.
Concepts Used in Calculator in JavaScript
- DOM manipulation
- Events in JavaScript
- Functions in JavaScript
- Operators in JavaScript
Why Build Calculator in JavaScript
Calculator in JavaScript is a great project for beginners to understand how user input, logic, and DOM work together. It helps build strong fundamentals.
Conclusion
Calculator in JavaScript is one of the best beginner projects. It helps you apply JavaScript concepts in a practical way and improves problem-solving skills.
FAQs
What is calculator in JavaScript
It is a simple application that performs arithmetic operations using JavaScript.
Which concepts are used in this project
DOM, events, functions, and operators are used.
Is calculator project good for beginners
Yes, it is one of the best projects to start with.