What is the output of the following program?and also tell why it is like that...

Question

#include <stdio.h>
int main()
{
int x ;
printf("%d",scanf("%d",&x));
return 1;
}

Answer 1

scanf() returns the number of arguments that were successfully assigned, so the output depends on whether the input is good or bad.
https://en.cppreference.com/w/c/io/fscanf