C program Hello world

Helloworld.c, This is a first C program for a learner who is interested in C programming language. The Helloworld program explains basic structure of code in c to the learner. The C program learners are going to understand the following from this program.

• A C program must have a main function.
• The main function may have a return type or void.
• The main function may have commandline argument or not.
• The C program starts execution from the main function.
• The printf build-in function prints formatted string or any datatype on computer screen.

Helloworld C Program

The helloworld c program just prints hello world message on computer screen

 
#include <stdio.h>
int main() {

   printf("\n Hello world  C ");
   return 0;
}
 

Helloworld C++ Program

The helloworld c++ program just prints hello world message on computer screen

 
#include <iostream>
using namespace std;

int main() {

   std::cout<<" \n Hello world  C++";
   return 0;
}
 

Download source code

1. helloworld.c


2. helloworld.cpp