The area and the circumference of circle is calculated from the radius using the formula.

When the radius r is input and "Calculate area of circle" button is clicked, the area and the circumference of the circle are calculated and displayed.

### The area of the circle where the radius is 1

Area S: 3.1415926535898

Perimeter L: 6.2831853071796

Perimeter L: 6.2831853071796