Can someone tell me why there is a lot of numbers 4?

Question

Hello! I'm just a beginner who have a little problem, in the line where is "num = 2 * 2, it should give me answer "4", and it did but like 40 times, here is code that i don't understand :

#include <iostream>
using namespace std;

int main()
{
int num = 1;
while (num < 6) {
cout << "Number: " << num << endl;
num = 2 * 2;
}

return 0;
}

Answer 1

num=2*2 will always give you 4. 4 is lower then 6. As such the loop always repeats.

Answer 2

If you want to print 4 as value of num you should put "num = 2 * 2" before making the output.

#include <iostream>
using namespace std;

int main()
{
int num = 1;
while (num < 6) {

num = 2 * 2;
cout << "Number: " << num << endl;
}

return 0;
}

But do you really want to set the value of num constantly to 4? Because with this code the value of num never changes, it is always 4 and the loop has no ending, because num never reaches 6.

Maybe this one is better:

int main()
{
int num = 1;
while (num < 6) {

if (num==4) {
cout << "Number: " << num << endl;
}
num +=1;
}

return 0;
}