i =         10   j25
r =  3.14159000000000e+01   2 * r =  6.28318000000000e+01
also r = 3.1e+01   and r =  3.142e+01   finally r =  31.416
and r =             31.4159000000
This program works? true
This progr      true
     This program works? true
This true

15 statements executed in 0.03 seconds cpu time.