Question

Create a float variable named diameter. This variable will hold the diameter of a circle. d. Create a float variable named PI.

Answer 1

Answer:

float diameter=2*r; //hold the diameter of a circle

float PI; // float variable named PI.

Explanation:

Here we have declared two variable i.e diameter and PI of type float. The variable diameter will hold the diameter of a circle i.e  2*r  where r is the radius of a circle.

Following are the program in c++

#include <iostream> // header file

using namespace std; // namespace

int main() // main function

{

   float r=9.2; // variable declaration

float diameter=2*r; //hold the diameter of a circle

float PI=3.14; // float variable named PI hold 3.14

cout<<"diameter IS :"<<diameter<<endl<<"PI IS :"<<PI; // display value

  return 0;

}

Output:

diameter IS :18.4

PI IS :3.14