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JavaScript if else statement makes it easy to execute code based on different conditions. This tutorial will help you learn all you need to know about if else statement. You will learn how to use if
, else
, else if
and nested if else. You will also learn about ternary operator and much more.
JavaScript if else statement makes it very easy to execute your code if specific conditions is truthy. Its syntax is just as easy. It is composed of three parts. The first part is if
keyword. You use this keyword to tell JavaScript that you are about to create an if else statement.
The second part is a condition you want to test for. Condition is wrapped with parentheses and it follows the if
keyword. This can condition can range from very simple to very complex expressions. The only thing that matters is if the result of that expression is boolean, either true
or false
.
The third part is a block of code you want to execute. This block of code is surrounded by curly brackets. It follows right after the condition. Remember that this block of code will be executed only if the condition evaluates to true
, is truthy. If it evaluates to false
, it is falsy, the block of code will not be executed.
#javascript #web development #programming
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JavaScript if else made simple.
📺 The video in this post was made by Programming with Mosh
The origin of the article: https://www.youtube.com/watch?v=IsG4Xd6LlsM&list=PLTjRvDozrdlxEIuOBZkMAK5uiqp8rHUax&index=7
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#javascript #if else #javascript if else #javascript if else (tutorial)
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Object-oriented programming in JavaScript: learn all about objects, prototypes, prototypical inheritance, this and more.
TABLE OF CONTENT:
00:00: What is OOP?
01:46: Four Pillars of OOP
08:50: Setting Up the Development Environment 11:07: Objects
11:53: Object Literals
14:58: Factories
17:50: Constructors
23:27: Constructor Property
25:53: Functions are Objects
31:09: Value vs Reference Types
37:00: Adding or Removing Properties
40:54: Enumerating Properties
43:45: Abstraction
47:48: Private Properties and Methods
51:55: Getters and Setters
57:32: Exercise
59:42: Solution
📺 The video in this post was made by Programming with Mosh
The origin of the article: https://www.youtube.com/watch?v=PFmuCDHHpwk&list=PLTjRvDozrdlxEIuOBZkMAK5uiqp8rHUax&index=3
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Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!
#javascript #object-oriented programming #object-oriented programming in javascript #object-oriented programming in javascript: made super simple
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Work on real-time JavaScript Snake game project and become a pro
Snake game is an interesting JavaScript project for beginners. Snake game is a single-player game, which we’ve been playing for a very long time. The game mainly consists of two components – snake and fruit. And we just need to take our snake to the food so that it can eat and grow faster and as the number of fruits eaten increases, the length of snake increases which makes the game more interesting. While moving if the snake eats its own body, then the snake dies and the game ends. Now let’s see how we can create this.
To implement the snake game in JavaScript you should have basic knowledge of:
1. Basic concepts of JavaScript
2. HTML
3. CSS
Before proceeding ahead please download source code of Snake Game: Snake Game in JavaScript
HTML builds the basic structure. This file contains some basic HTML tags like div, h1, title, etc. also we’ve used bootstrap (CDN is already included).
index.html:
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>DataFlair Snake game</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<link rel="stylesheet" href="static/style.css">
</head>
<body>
<div class="container">
<div class ="Jumbotron">
<h1>DataFlair Snake game using vanilla JavaScript</h1>
<h2 class="btn btn-info">
Score: 0
</h2>
<div class="containerCanvas">
<canvas id="canvas" width="500" height="500" class="canvasmain"> </canvas>
</div>
</div>
</div>
<script src="static/fruit.js"></script>
<script src="static/snake.js"></script>
<script src="static/draw.js"></script>
</body>
</html>
We have used simple HTML tags except
#javascript tutorial #javascript project #javascript snake game #simple snake game #javascript
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JavaScript is unarguablly one of the most common things you’ll learn when you start programming for the web. Here’s a small post on JavaScript compound assignment operators and how we use them.
The compound assignment operators consist of a binary operator and the simple assignment operator.
The binary operators, work with two operands. For example a+b where + is the operator and the a, b are operands. Simple assignment operator is used to assign values to a variable(s).
It’s quite common to modify values stored in variables. To make this process a little quicker, we use compound assignment operators.
They are:
You can also check my video tutorial compound assignment operators.
Let’s consider an example. Suppose price = 5 and we want to add ten more to it.
var price = 5;
price = price + 10;
We added ten to price. Look at the repetitive price variable. We could easily use a compound += to reduce this. We do this instead.
price += 5;
Awesome. Isn’t it? What’s the value of price now? Practice and comment below. If you don’t know how to practice check these lessons.
Lets bring down the price by 5 again and display it.
We use console.log command to display what is stored in the variable. It is very help for debugging.
Debugging let’s you find errors or bugs in your code. More on this later.
price -= 5;
console.log(price);
Lets multiply price and show it.
price *=5;
console.log(price);
and finally we will divide it.
price /=5;
console.log(price);
If you have any doubts, comment below.
#javascript #javascript compound assignment operators #javascript binary operators #javascript simple assignment operator #doers javascript
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#how to build a simple calculator in javascript #how to create simple calculator using javascript #javascript calculator tutorial #javascript birthday calculator #calculator using javascript and html