fill in the blanks to find out whether the value of "a" is an odd number or even number

Question

int a;
cin>>a;
if(a_2==0)
cout<<"the number is even";
else
cout<<"the number is odd";

Answer 1

The answer is '%'; the modulus operator. The modulo returns the remained of a division e.g.

10 % 3 = 1
7 % 5 = 2
30 % 9 = 3

Answer 2

%

Answer 3

%

Answer 4

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