While loop error

Question

I don't understand why program doesn't work. It should print 3,6,9,12,15,18;

#include <iostream>
using namespace std;

int main()
{
//change the code
int num = 0;
while(num<=20){
if (num%3=0)
cout <<num;

else
num+=1;

return 0;
}

Answer 1

There are a few things, you can see in the update as follows:

#include <iostream>
using namespace std;

int main()
{
//change the code
int num = 0;
while(num<=20){
if (num%3==0)
cout <<num<<" ";

// else
num+=1;
}

return 0;
}

Answer 2

Not all can see the pro tasks.

Answer 3

Thanks I see what I did wrong, but the program still doesn't work properly..

Answer 4

So i have this:
#include <iostream>
using namespace std;

int main()
{
//change the code
int num = 0;
while(num<=20){
cout<<num<<endl;
num+=1;
}

return 0;
}

and I need to change the program to only print 3,6,9,12,15,18 instead of all from 1 to 20

Answer 5

#include <iostream>
#include <string>

using namespace std;

int num=20;
while (num >= 1){

num-=1;
If((num%3)==0){
cout<<num;
continue;
}
else{
continue;
}
}

/*IMHO this should work*/

Answer 6

yes thank you, i didn't know this ++num thing thanks