A simple C program to display “Hello, World!” on the screen. Since, it ‘s a very simple program, it is often used to illustrate the syntax of a programming language..Here, is a Hello World program in C #include //Pre-processor directive void main //main function declaration { printf “Hello World” ; .C program to print hello world a number of times. #include int main { int c, n; printf “How many times you want to display it?\ n” ; scanf ” d”, n ; for c=1; c.