Skip to content

Introduction to a programming language

Here you will learn about a programming language ( What they are ?, Why are they necessary ?, Some examples of programming languages and the types of programming language.)

What is a programming language ?

A programming language is a set of instructions written in form of strings to the computer.

Why a programming language ?

A computer cannot simply understand instructions such as subtract 5 from 8 or add 100 and 2.

So a programming language converts the strings into a computer readable form and executes them.

Types of programming languages

Procedural Programming Language

Functional Programming Language

Scripting Programming Language

Logic Programming Language

Object-Oriented Programming Language

Examples of programming languages

Some examples of programming language are : Python, Javascript, C, C++, Java, Rust, Ruby, Typescript etc.

Hello World program in a few languages :

You can find more here 

#include <stdio.h>

int main(void) {
  printf("Hello world!\n");
  return 0;
}

#include <iostream>

int main(void) {
  std::cout << "Hello world!" << std::endl;
  return 0;
}

console.log("Hello World")

print("Hello World")

COMMENTS

A comment is used to explain a part of the program to the user. It is generally ignored by compilers and interpreters.

// This is a single line comment
/* This is slightly long
multi line comment*/

#single line comment in Ruby

=begin 
This is slightly long
multi line comment in Ruby
=end

– – single line comment in Haskell

{- longer comment :
multi line comment in Haskell -}

#hello comment 1 in python
#comment 2 in python