Fortran: Lesson 3

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Demo 8

								        program demo8
c       This program computes in double precision the volume and
c       surface area of a ball.  The radius is input by the user.
c       Note that all numbers, except integer exponents, are
c       written with double precision notation. Results are
c       printed in a table with write and format statements.

double precision r, vol, surf, pi
parameter (pi = 3.1415926535897932D0)

print *, "What is the radius of the ball ?"