"""
Exercise 2.1 from "A primer on..."
"""


print('------------------') # table heading
F = 0
dF = 10
while F <= 100:             # loop heading with condition
    C = (5/9) * (F - 32) 
    print(f"{F:6.2f}, {C:6.2f}") #f-string for nicer formatting
    F = F + dF              
print('------------------') # end of table line

"""
Terminal> python f2c_table_while.py 
------------------
  0.00, -17.78
 10.00, -12.22
 20.00,  -6.67
 30.00,  -1.11
 40.00,   4.44
 50.00,  10.00
 60.00,  15.56
 70.00,  21.11
 80.00,  26.67
 90.00,  32.22
100.00,  37.78
------------------
"""