Functions in C

1. Main() :
• Main () is a collective name given to a set of statements. It is a function. Every function has a pair of parenthesis () associated with it.
2. Void :
• If we want that the main() function should not return any value then we should preceed it with the keyword void.

• Void main(). 

     3. printf :

• This function is used to display the output.