Lesson topics

Demo 1

												        program circlearea
        real r, area, pi
        parameter (pi = 3.14159)
c       This program computes the area of a circle.
        print *, "What is the radius?"
        read *, r
        area = pi * r ** 2
        print *
        print *, "The area is", area
        print *
        print *, "Bye!"
        end