In printing even no. here if we gave value of a =5 then it is also printing 5 with other results how we solve this

#1

#include
using namespace std;
int main() {
int a;
cout << "Enter the digit: " << std::endl;
cin >> a;

if (a % 2 != 0) {
    a = a - 1;
}

while (a >= 0) {
      cout << a << std::endl;
    a = a - 2;
}

return 0;

}

#2

The issue is a >= 0 includes zero; change to a > 0 to avoid printing zero.

#3

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