Write program named program51.py that defines a value-returning function named circle that takes the radius of a circle as its sole argument and returns both the area and circumference of the circle. Prompt the user to enter the radius from the keyboard in the main function and then call the circle function. The main function should "catch" the values returned by circle and display both the area and circumference accurate to three decimal places.
SAMPLE OUTPUT
Enter circle radius 10
Circle area is 314.159
Circle circumference is 62.832