simple for loop

[Kokila]

#include <stdio.h>

void main()
{
int x;
for(x=10;x;x--)
printf("%d\n",x);
}

In the above program, the output is printing from 10 to 1. But I didn't give any lower limit. How is it printing like that?

Regards
Kokila

[Shiro]

You did give a lower limit. The loop stops when x is false, which reached as x is 0.

[Cshot]

Let's compare it with a typical condition and let's see why they both work:

for(x=10;x;x--)
versus
for(x=10; x > 0; x--)

x     x > 0  
10    1
9     1
8     1
7     1
6     1
5     1
4     1
3     1
2     1
1     1
0     0

Notice the for loop will run when it is TRUE or a non-zero value.

[Hammer]

>>void main()
main() returns an int, so make it
>int main(void)

and return 0; at the end.

[Kokila]

Thanks for all the responses.