"""
This module demonstrates simple loops of the form:
   for k in range(blah):
      ... k ...

Authors: Many, many people over many, many years.
         David Mutchler, Yiji Zhang, Mark Hays, Derek Whitley, Vibha Alangar,
         Matt Boutell, Dave Fisher, Sriram Mohan, Mohammed Noureddine,
         Amanda Stouder, Curt Clifton, Valerie Galluzzi,
         and their colleagues wrote this version.
"""
# -----------------------------------------------------------------------------
# Students: Read and run this program.
#           Make sure that you understand all 3 examples.
# -----------------------------------------------------------------------------


def main():
    """ Calls the other functions to demonstrate and/or test them. """
    example1()
    example2()
    example3()


def example1():
    """ Prints a message, then   0  1  2  3  ... 7. """
    print()
    print("--------------------------------------------------")
    print("Running example1:")
    print("--------------------------------------------------")
    for k in range(8):
        print(k)


def example2():
    """ Prints a message, then  0  5  10  15  20 ... 50. """
    print()
    print("--------------------------------------------------")
    print("Running example2:")
    print("--------------------------------------------------")
    for k in range(11):
        print(5 * k)


def example3():
    """ Prints a message, then  1  4  7  10  13  16. """
    print()
    print("--------------------------------------------------")
    print("Running example3:")
    print("--------------------------------------------------")
    for k in range(6):
        print(1 + (3 * k))


# -----------------------------------------------------------------------------
# Calls  main  to start the ball rolling.
# -----------------------------------------------------------------------------
main()