if i change %f to %d a new number appear i dont know why?

Question

#include <stdio.h>

int main() {
const double PI = 3.14;
printf("%f", PI);

return 0;
}
if i change %f to %d a new number appear i dont know why?

Answer 1

%d stands for decimal and it expects an argument of type int (or some smaller signed integer type that then gets promoted). Floating-point types float and double both get passed the same way (promoted to double) and both of them use %f.