DEV Community: Prateek Arora

How we can use the export module in JavaScript?

Prateek Arora — Thu, 22 Sep 2022 15:45:26 +0000

This is infographic of how to export module in JavaScipt.

You may not need the if-else statement😎

Prateek Arora — Mon, 09 Sep 2019 12:56:44 +0000

This post was originally written on my blog PrateekCodes.

So, today I am going to show you a little simple tip of writing an if statement without using if statement in a shorter way. It's a short, simple and coolest version of IF statement.

This can help you clean up your code a little bit, making it easier to read.

Let's see how if statement works:

An if statement evaluates the test expression inside the parenthesis ()

If the test expression is true, statements inside the body of if are executed.
If the test expression is false, statements inside the body of if are not executed.

Let's see the code how we write if statement while writing code ??

Let's see how the if statement code looks like:

    if(condition){
        //block of code to be executed if the condition is true
    }

Now let's look at the `&&` operator

The && operator is also known as the logical AND operator. It evaluates operands from left to the right and returns the first falsy value.

For each operand or case, && operator converts the value into boolean. If the output is false, it stops the execution and returns the last operand value.
If all operands or cases are true, it returns the last operand.

//If the first operand is true,
//return the second operand

alert( 1 && 3 ); // 3

//if the first operand is falsy,
//return first false value,
//and ignore left operands

alert( null && 2 ); // null

So now let's see the shortest way of writing an if statement

Basically, to create your own if statement using && operator, you have to follow this structure

(condition) && (some instructions)
for example: someVar > someOtherVar && console.log('yeah') This will log 'yeah' if someVar is bigger than someOtherVar. #### Using If statement

var a=60;
var b=21;
if(a>b){
    console.log(`${a} is greater than ${b}`);
}

Output

Using && opreator

var a=60;
var b=21;
(a>b)&&(console.log(`${a} is greater than ${b}`))

Output

In this example, we created two if statements. One with the traditional method and the other with the && operator, to check if (a>b) is truthy. As we can see, both cases are logged the same console.

You can also create your own if-else using && and || operator

First, write an if condition like (true or false)
If the condition is truthy, the operator executes the truth body, and the || (or operator) stops the execution as it found a truthy value. || returns the first truthy false.
Else executes when the condition is falsy when using the || operator. The || operator moves to the next operands to find the first truthy value.

Example

execute by own and create your own if-else statement 😂

((false) && (console.log("execute when condition true")||true))
||console.log("execute when condition false")

Thank you so much for reading my article on You may not need if-else statement! Be sure to follow me on Twitter for lots of tweets about tech. Feel free to comment below or tweet me with any questions you may have.

Things to know before learning your first programming language

Prateek Arora — Sun, 04 Aug 2019 17:30:11 +0000

What is a Programming Language and why do we need one??

Programming languages are what we use to tell computers what to do.

Programming languages are a means through which we convey our messages to the electrical systems. It can be a computer, an electronic washing machine, your mobile phones or any electrical device you use.

In Simple Words, Programming Language acts as a bridge Between User and System to communicate.

Do You Know Binary Code of 2 is 10? These represent two states: on (1)and off (0). You Can Convert Your Text From here

Computers talk to one another in binary, which looks like this:

0011101010101111000111

Imagine Whats Happen if no Programming Language in the market

We have to tell a computer to create a red box on the screen for a website.

In English, we say:

Create a box.

Sure, ones with straight edges, curved edges?

Make it red.

Wait to make the edges red or the whole thing red?

Make it fill the screen.

What about the screen?

Screen, the thing I’m looking at.

What are you looking at?

Ohh, forget it.

See the problem now?

The system is not designed to understand Human Language. To Resolve that, We need a Language that communicates with System. So whats does Programming Language do. A programming language allows us to give instructions to a computer in a language the computer understands.

Program is a Set Of instruction that tell the computer what tasks to perform. The rules for writing a format of code and combinations of the set of instructions is called Syntax.

The syntax is similar to Spelling, tense, and punctuation in English to write a sentence.

Types Of Programming Languages

There are 2 Type of Programming Languages:-

1. High-Level Language

2. Low-Level Language

High-level programming languages are easily understandable by a human. It was created by developers so that programmers don’t face any difficulty to communicate with a System. Example:- JS, Python🐍 , and so more.

Low-level languages are designed to deal with the hardware of a computer directly. Low-level languages are closer to the system 💻.

The computer needs a way to understand our program into Binary Code That’s System Understand. To do this, we’ll need a translator.

Translator

A translator is a program that converts your code to the machine language.

Different type of translators

The different kinds of translators are as follows:

Compilers:- It translates the entire program and translates code into Binary code. It generates the error message only after scanning the whole program. Due to this, debugging is comparatively hard, and it takes more time to translate the code. Programming language like C, C++ use compilers.
Interpreter:- It translates code line-By-line. It continuously translates the code until the first error is met. Due to Translate code, line-by-line debugging is easy. It takes less time to convert the code. Programming language like Js, Python, Ruby use interpreters.

Different Way of Writing the Hello World In Programming Language

Java

public class Hello {  
    public static void main(String []args) {  
        System.out.println("Hello World");  
    }  
 }

Python

print "hello world"

JavaScript

Console.log('hello world');

#include <iostream> main()  
{  
std::cout << "Hello, World.";  
}

Bash

#!/bin/sh  
 echo "Hello World"

<?php echo “Hello World”; ?>;

Thank you so much for reading my article on Things to know before starting your first programming language!. Be sure to follow me on Twitter for lots of tweets about tech. Feel free to comment below or tweet me with any questions you may have.