Why output is 5?

Question

#include<stdio.h>
int main()
{
int b=5;
b%=7;
printf("%d",b);
return 0;
}

Answer 1

b = 5
b %= 7 is same like b = b % 7
which is b = 5 % 7 = 5

print(b) output is 5

% is modulus which return remainder of a/b(5/7)

You probably need to revise your course again especially operation operator and stuff.