while loop error

Question

hy guys,

can you tell me where am i mistaking please;

#include <iostream>

using namespace std;

int main()
{
int x,y;
cout << "Enter a number from 3 to 20 !" << endl;
cin>>x;
y=x+17;
while(x<3 && x>20)
{
cout<< "Error ,enter a number from 3 to 20 !"<<endl;
cin>>x;
}
cout<<"The new number is : "<<y<<endl;

return 0;
}

Answer 1

Your condition of the while loop is a logical AND. But a number x can not be smaller than 3 AND larger than 20 at the same time, so your loop is never executed. What you need here is an OR (written as two pipe symbols like this || ).

Answer 2

ah okay thank you