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 If - Else example

If - Else example #include <iostream.h> #include <math.h> int main() { double radius; //get user input cout<<"Please enter the radius : "; cin>>radius; //act on user input if(radius < 0.0) cout<<"Cannot have a negative radius"<<endl; else cout<<"The area of the circle is "<<3.1416 * pow(radius,2)<<endl; return 0; }



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