First 'Hello World!' program in C.| DataType | Header |

'HelloWorld!' Program.

#include<stdio.h> //header file void main() { printf("HelloWorld!"); }

Keywords:

It define as the set of specific word which meaning are predefined in system(Language).

Example:

int, long, for, double, while, do, static, main, float, if, case, break etc.

Header File:

Header file is defined as the collection of different system define function.

stdio.h, conio.h, dos.h, string.h, stdlib.h, math.h etc.

main()

It is core of every program. It contains instructions that tell to the computer to carry out what ever task your program is designed to do.

DataType