C++ program to calculate area of the circle if the radius is greter than 0

C++ program to calculate the area of the circle if the radius is greater than 0.

C++ program to calculate the area of the circle

//C++ program to calculate area of the circle
#include <iostream>
using namespace std;
 int main() {
   float radius, area_circle;
   // take radius as input
   cout << "Enter the radius of circle: ";
   cin >> radius;
if(radius>0)
{
   area_circle = 3.14 * radius * radius;
   cout << "Area of circle: " << area_circle << endl;
}
   return 0;
}

//C++ program to calculate area of the circle

#include <iostream>

using namespace std;

int main() {

float radius, area_circle;

// take radius as input

cout << "Enter the radius of circle: ";

cin >> radius;

if(radius>0)

{

area_circle = 3.14 * radius * radius;

cout << "Area of circle: " << area_circle << endl;

}

return 0;

}

Output

Enter the radius of circle: 4

Area of circle:50.24

The same program with another style

#include <iostream>
int main()
{
    float radius, area;
    std::cout << "Please Enter the radius of circle : ";
    std::cin >> radius;
    area = 3.14 * radius * radius;
    std::cout << "Please Area of circle with radius "<< radius << " is " << area;
}

#include <iostream>

int main()

{

float radius, area;

std::cout << "Please Enter the radius of circle : ";

std::cin >> radius;

area = 3.14 * radius * radius;

std::cout << "Please Area of circle with radius "<< radius << " is " << area;

}

C++ program to calculate the area of the circle if the radius is greater than 0.

//C++ program to calculate area of the circle
#include <iostream>
using namespace std;
 int main() {
   float radius, area_circle;
t4tutorials:
   // take radius as input
   cout << "Enter the radius of circle: ";
   cin >> radius;
if(radius>0)
{
   area_circle = 3.14 * radius * radius;
   cout << "Area of circle: " << area_circle << endl;
}
		goto t4tutorials;
   return 0;
}

//C++ program to calculate area of the circle

#include <iostream>

using namespace std;

int main() {

float radius, area_circle;

t4tutorials:

// take radius as input

cout << "Enter the radius of circle: ";

cin >> radius;

if(radius>0)

{

area_circle = 3.14 * radius * radius;

cout << "Area of circle: " << area_circle << endl;

}

goto t4tutorials;

return 0;

}

Output

Enter the radius of circle: 4

Area of circle:50.24

Enter the radius of circle:

C++ program to calculate area of the circle if the radius is greter than 0
By: Prof. Dr. Fazal Rehman | Last updated: October 21, 2023

C++ program to calculate the area of the circle

C++ program to calculate the area of the circle if the radius is greater than 0.

C++ Exercise | If else Statement

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