why there is semicolon after loop while();

Question

I am reading a code of my friend an I see this:

#include 
#include 

void main()
{
    char string1[125], string2 [10];
    in         


        

Answer 1

Semicolon is like empty instruction. If we don't put any instruction after while or use loop while with {} we must use semicolon to tell compiler that all we want from while loop is doing this empty instruction.