OR operator

Question

How do these two programs really work? i know o/p. but don't know logic.
1.
#include <stdio.h>

int main() {
// Write C code here
int x=-2;
while(++x || x==0){
printf("X");
}
}

2.
#include <stdio.h>

int main() {
// Write C code here
int x=-2;
while(x++ || x==0){
printf("X");
}
}

Answer 1

Shubham Rampurkar When using OR operator if the 1st operand(++x) is true, no need to check 2nd (x==0). Loop become false only if both operand are false.

Case 1:

Here pre increment when x=-1
(++x||x==0) => (0 || 0==0) 1st operand(0) is false but 2nd condition(0==0) is true, so loop continus infinite times

Case 2:

Here post increment when x=0
(x++||x==0) => (0 || 1==0) both operand become false loop ends here.