Can anyone help me understand this output?

Question

Hi guys, I recently completed a challenge in C++ but I don't understand an output. The code give the variables i=2 and j=5 and ask to print the output after a modulus operation between them. Why the result is 2? I can't understand.

For better understanding this is the entire block of code:
int i=2,j=5,a=0,b;
a=i%j;
cout<<a;
b=a%i;
cout<<b;

Output 20

Answer 1

I found a better answer on the internet. To calculate the remainder we can use the formula r = a - (b*q) where a is the dividend, b is the divisor and q is the quotient, so r = 2 - (5*0).

Answer 2

Stefano Di Somma 5 cannot go in to 2, then the output is 2 because if you divide 2/5, you get 0 remainder 2.<-

Answer 3

So the 2 you got is the value of i?

Answer 4

2 modulo 5 is 2 since 2 can go into 5 2 times, so a = 2. The 2 from a modulo 2 gives you 0 since there is no remainder, thus b = 0. No endl, so your prints will be on one line.