The modulus operator. : modulus operator « Operators statements « C++ Tutorial

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2. Operators statements
3. modulus operator

#include <iostream> 
using namespace std; 
 
int main() 
{ 
  int x, y; 
 
  x = 10; 
  y = 3; 
  cout << x << " / " << y << " is " << x / y <<  
       " with a remainder of " << x  y << "\n";  
 
  x = 1; 
  y = 2; 
  cout << x << " / " << y << " is " << x / y << "\n" << 
          x << "  y;  
 
  return 0; 
}

10 / 3 is 3 with a remainder of 1
1 / 2 is 0
1 % 2 is 1"