Intellipaat’s online JavaScript compiler is a tool that will help you turn your JavaScipt code into computer-readable code that you can run on your browser. It is a user-friendly platform that will help you write, test, and run your code easily. This online JavaScript compiler makes sure that your code is correct and works fine when you run it on any app or website.
Features of Intellipaat’s Online JavaScript Compiler
If you are looking for a compiler where you can easily write and run your codes. Intellipaat’s online JavaScript compiler will provide you with different features to write, test, and run your JavaScript code. Let’s discuss the key features of Intellipaat’s online JavaScript compiler:
- Free of cost: Intellipaat’s online JavaScript compiler is a free tool that makes it accessible to everyone.
- Accessible everywhere: You can access the online compiler anywhere because you just need an internet connection to work on it.
- Good library support: It offers you rich library support so you don’t need to worry while coding.
- No installation required: You don’t need any setup or installation to work on it because this is an online compiler that runs on the browser.
How Online JavaScript Compiler Works?
Here are the step-by-step instructions on how the JavaScript compiler works:
- Reading: It starts with reading the code you have written.
- Converting: After reading the code, it will break your code into smaller parts and convert it into a simpler form that the computer can understand.
- Optimizing: After converting, it will check your code again and see if it can make the code faster and more efficient to run smoothly.
- Executing: At last, it will run your code on the browser.
Practice on Online JavaScript Compiler
Online JavaScript compiler is a great tool to run and test your JavaScript codes without installing anything. But you must know what is JavaScript and its features and syntaxes. Let’s start by writing a simple program using Intellipaat’s online JavaScript compiler.
Write Your First JavaScript Program in an Online Compiler
Let’s see step-by-step how you can write a JavaScript program to find the sum of two numbers:
Step 1: Open the Intellipaat’s online JavaScript compiler.
Step 2: Once open, type the following code in the editor.
let x = 10;
let y = 5;
let sum = x + y;
console.log("The sum of X and y is "+ sum);
Step 3: Click on the ‘Run’ button to execute your program.
Step 4: You will get the following output:
What is JavaScript?
JavaScript is a programming language that will help you make your website interactive. You can create buttons, pop-ups, animations, etc. using JavaScript. It allows you to control the actions of a webpage like the responses when you click on something.
JavaScript Syntax
To write good JavaScript code, you must know all the important JavaScript syntaxes. Here are some important syntax elements that every developer should know about when coding using JavaScript:
JavaScript Variables
Variables in JavaScript are used to store data like text and numbers. You can store and change data in your code using variables. There are 3 types of variables in JavaScript:
1. var: It is an older way to declare variables.
Example:
var x = 5;
2. let: It is the newer and more preferred way to declare variables that you can also change later.
Example:
let x = 10;
3. const: It is used to declare variables that can not be changed once you have set the value.
Example:
const pi = 3.14;
Arrays in JavaScript
An array is a type of variable that can hold multiple values. It is a group of items or values.
Syntax:
let arrayName = [value1, value2,..etc];
Functions in JavaScript
Functions in JavaScript are the reusable block of codes that performs a specific task. You can call them whenever you need. Functions take inputs known as ‘Parameters’ and return output known as ‘return value’.
Syntax:
function functionName(parameters) {
// Code
return value;
}
Example: ‘a’ and ‘b’ are two parameters and we will create a function to get the sum.
function add(a, b) {
return a + b;
}
let result = add(3, 4);
console.log("Sum of a and b is "+ result);
Output:
Arrow Functions in JavaScript
Arrow functions in JavaScript are just a shorter way to write a function. It contains ‘=>’ instead of the actual function keyword.
Syntax:
() => expression
Example: There are two parameters ‘x’ and ‘y’. We will create a function to get the sum of them using both methods the regular function method and the arrow function method.
// Regular function
function add(x, y) {
return x + y;
}
// Arrow function
const add = (x, y) => x + y;
Loops in JavaScript
1. For loop
For loop in JavaScript allows you to repeat the code for each item in a list or range.
Example:
for (let i = 0; i < 5; i++) {
console.log(i);
}
Output:
2. While loop
While loop in JavaScript repeats the statements based on a condition. It allows you to repeat the code until the condition is true. We use a while loop when we don’t know the number of loop cycles.
Example:
let i = 0;
while (i < 5) {
console.log(i);
i++;
}
Output:
3. Do-while loop
A Do-while loop in JavaScript also repeats the statements based on a condition and allows you to repeat the code until the condition is true. But it is mostly used when you need to run the loop at least once.
Example:
let i = 0;
do {
console.log(i);
i++;
} while (i < 5);
Output:
Conditional Statements in JavaScript
Conditional Statements are really important in JavaScript and will help you make decisions based on the conditions. The basic conditional statements are “if-else,” and “switch” statements.
1. If-else Statement
if-else statement in JavaScript is used when there is a condition in the code and if the condition is met then the code in the ‘if’ block will be executed otherwise the code in the ‘else’ block will be executed.
Syntax:
if (condition) {
// Code will be executed if the condition is true
} else {
// Code will be executed if the condition is false
}
2. Switch Statement
The ‘switch’ statement in JavaScript is an alternative to the ‘if-else’ statement. It is used when you have multiple conditions to check and only a single block of code will be executed based on the value of the variable.
Syntax:
switch (expression) {
case value1:
// Code will be executed if expression = value1
break;
case value2:
// Code will be executed if expression = value2
break;
default:
// Code will be executed if no case matches
}
Classes in JavaScript
Classes were introduced in JavaScript by ES6 with other OOP concepts. A class is like a template to create objects with shared properties and methods.
Syntax:
class ClassName {
constructor() {
// properties
}
method() {
// Code
}
}
Example: We have a class ‘Employee’ that we will use to create an employee ‘Intellipaat’ and the ‘message’ method will print the message.
class Employee {
constructor(name) {
this.name = name;
}
message() {
console.log(`Hello, this is ${this.name}.`);
}
}
let employee1 = new Employee("Intellipaat");
employee1.message();
Output:
So far we have learned what is an online JavaScript compiler and what features Intellipaat’s online JavaScript compiler provides. We also discussed what is JavaScript programming language and its important syntaxes you should know including loops, functions, etc.
FAQs – Online JavaScript Compiler
1. What is an online JavaScript compiler?
An online JavaScript compiler is a tool that will help you run and test your code fast and easily using any browser.
2. Is Intellipaat’s online JavaScript compiler easy to use?
Yes, Intellipaat’s online JavaScript compiler is easy to use. It gives you a user-friendly interface where you can find everything you need to run and test your code.
3. What are the benefits of using an online JavaScript compiler?
The key benefits of using an online compiler are:
- You can quickly access the editor.
- You don’t need to manually download and install anything.
- File sharing is really easy in the compiler.
- It’s a great tool for testing small codes.
4. Do I need to install anything to use an online JavaScript compiler?
No, you don’t need to install anything because the online JavaScript compiler runs on the web browser. You just need an internet connection.
5. What are the limitations of using an online JavaScript compiler?
There are some limitations in an online JavaScript compiler which are:
- Resources like RAM and CPU are limited so you can’t use the online compiler for bigger projects.
- You can not upload bigger files on an online JavaScript compiler because of the size limitation.
- There are time-out limits because of that sometimes the online compiler stops executing the code that takes too much time to run.
6. Can I save and share my code on an online JavaScript compiler?
Yes, you can do that on an online JavaScript compiler. You can use the features that will help you save your code in the cloud and you can share the link of it to others.