C Hello World

Following example presents you a Hello World Example.

#include<stdio.h>
int main()
{
    printf("Hello world");
    getchar();
    return 0;
}

Before we begin with our first C program do remember the following rules that are applicable to all C programs:

  1. Each instruction in a C program is written as a separate statement. Therefore a complete C program would comprise of a series of statements.
  2. The statements in a program must appear in the same order in which we wish them to be executed; unless of course the logic of the problem demands a deliberate ‘jump’ or transfer of control to a statement, which is out of sequence.
  3. Blank spaces may be inserted between two words to improve the readability of the statement. However, no blank spaces are allowed within a variable, constant or keyword.
  4. All statements are entered in small case letters.
  5. C has no specific rules for the position at which a statement is to be written. That’s why it is often called a free-form language.
  6. Every C statement must end with a ;. Thus ; acts as a statement terminator.