A Technical Documentation Page

Introduction

JavaScript is the programming language of the web.

It can calculate, manipulate and validate data.

Hello World


          console.log("Hello World");

Variables

Variables are Containers for Data

In JavaScript, we use the var or let keywords to declare variables.

let

let x = 5;

If...else statement

Conditional statements are used to perform different actions based on different conditions.

The JavaScript if...else statement is used to execute/skip a block of code based on a condition.

if


          if (x > 0) {
            console.log("positive number");
          }

for statement

Loops can execute a block of code a number of times.

In JavaScript, the for loop is used for iterating over a block of code a certain number of times, or to iterate over the elements of an array.

for


          for (let i = 0; i < 3; i++) {
            console.log("Hello, world!");
          }

Function declarations

A function is an independent block of code that performs a specific task, while a function expression is a way to store functions in variables.

JavaScript functions are defined with the function keyword.

function


          funtion greet() {
            console.log("Hello World");
          }