#------------------------------------------------------------------------------
#  FormatNumbers.py
#  Illustrates str.format(). Read about the string format() function 
#  here: https://docs.python.org/3/library/string.html
#------------------------------------------------------------------------------
import random

# get a random number
x = random.uniform(-1000,1000)
y = -x   # and its negative

# Create a list of different format strings.
F = []
F.append("---->{0}<-------->{1}<----")                        # two arguments
F.append("---->{1}<-------->{0}<----")                        # switch arguments
F.append("---->{0:30}<-------->{1:30}<----")                  # field width 30
F.append("---->{0:<30}<-------->{1:<30}<----")                # left justified in a field of width 30
F.append("---->{0:>30}<-------->{1:>30}<----")                # right justified in a field of width 30
F.append("---->{0:.6}<-------->{1:.6}<----")                  # 6 digits of accuracy
F.append("---->{0:.6f}<-------->{1:.6f}<----")                # 6 digits to the right of the decimal point 
F.append("---->{0:^15.6f}<-------->{1:^15.6f}<----")          # centered in field of width 15
F.append("---->{0:<15.6f}<-------->{1:<15.6f}<----")          # same left justified
F.append("---->{0:>15.6f}<-------->{1:>15.6f}<----")          # same right justified
F.append("---->{0:<+15.6f}<-------->{1:<+15.6f}<----")        # same with + sign if positive, left justified
F.append("---->{0:>+15.6f}<-------->{1:>+15.6f}<----")        # same with + sign if positive, right justified
F.append("---->{0:< 15.6f}<-------->{1:< 15.6f}<----")        # same with a space for the sign if positive, left justified
F.append("---->{0:< 15.20f}<-------->{1:< 15.20f}<----")      # field expands if there are too many digits
F.append("---->{0:< 15.55f}<-------->{1:< 15.55f}<----")      # floats have at most 53 decimal digits of accuracy, 
                                                              # the rest of the field is padded with zeros
# print(F)

# Now print out the two numbers in different formats
for s in F:
   print(s.format(x, y))
# end for