''' Purpose: introduce variable manipulation through assignment
'''

print( )

# first generation there are 2 rabbits. each successive
# generation doubles the number of rabbits

nbr_rabbits = 2
generation  = 1

print( 'Generation: ', generation  )
print( 'rabbits:    ', nbr_rabbits )
print( )

# next generation

nbr_rabbits = 4
generation  = 2

print( 'Generation: ', generation  )
print( 'rabbits:    ', nbr_rabbits )
print( )

# next generation

nbr_rabbits = 8
generation  = 3

# next generation

print( 'Generation: ', generation  )
print( 'rabbits:    ', nbr_rabbits )
print( )

nbr_rabbits = 16
generation  =  4

# next generation

print( 'Generation: ', generation  )
print( 'rabbits:    ', nbr_rabbits )
print( )