Why does this program stop decrementing at 0?

[Gondvanaz]

Why does it stop at 0? What is the reason? Why is it not continuing the output with the negative numbers?

 #include <stdio.h>
int main(void)
{
	int i;
	printf("Enter an integer: ");
	scanf_s("%d", &i);
	for (; i; i--)
		printf("%d ", i);
	return 0;
}

[obscure]

When (i) reached 0 the condition for the loop becomes false and the loop terminates ...
Also , to what negative number you want to decrement ??

[Gondvanaz]

Oh, yeah... that's right... 'cause 0 is false.
One more question: what does the condition i stand for. I mean... just i... there is no operator!?

[obscure]

In general .. Any non-zero number will be treated as true ..
and zero is treated as false ..

In the above program it will display the numbers from the number the user inputs to 1 .. but if you enter a negative number it will go to infinite loop ..



I suggest you to read more about loops ...
http://www.cplusplus.com/doc/tutorial/control/