Boolean Question

[ahswong]

Would someone please clarify why entering 1 would return true and 0 would return false?

#include<iostream>
using namespace std;

int main() {
int x = -1;
cout << "Enter a 0 or a 1 from the keyboard: ";
cin >> x;
if (x)
   cout << "true" << endl;
else
   cout << "false" << endl;
   
  return 0;

}

[dhayden]

Because that's the way the language works. The expression inside an if statement is converted to bool. For integral types, zero converts to false and anything else converts to true.

[ahswong]

got it thanks!