Have in mind that the following code is ofr C++ but I know that whatever the language you are using, you can use the same idea:
<iostream>
using namespace std;
int main()
{
int count=0;
string x;
while(1)
{
cout<<"Enter either goose or duck";
cin>>x;
if ( x=="Goose") break;
count++;
}
cout<<"Number of Ducks="<<count<<endl;
return 0;
}
Another one that is simplier but the language is python is:
counter = 0while True: line = input()if line == 'duck': counter += 1 elif line == 'goose':breakprint(counter)