Challenge 2 Help

Question

int a;
cin>>a;
if(a _ 2==0)
cout <<"The number is even";
else
cout <<"The number is odd";

What to put here?

Answer 1

% gives you the remainder of an euclidian division.

42%9 is 6 (since 42 is 9*4+6)
a%b is 0 if a is a multiple of b
a%1 is always 0
a%2 is 0 if a is even and 1 if a is odd
a%10 gives you the last digit of a
a%100 gives you the last two digits of a
etc.