how does this work. ?

[adarshcu]

I saw this small code of a program to print HI without a semicolon in the program. I don understand how it works.

int main()
{
while(printf("HI")-2) 
{}
}

Any help would be appreciated.

[lighthead]

printf returns the number of bytes printed to the terminal. So the expression printf("HI")-2 returns 0. We end up with while(0){} .
For further clarification on printf visit here.
As printf is the expression used as the condition for the 'while' loop, no semicolon is required.It is same as

int val = printf("HI");
while(val - 2)//value of val is 2.
{

}

[adarshcu]

thanks. that helped.