Function Definition I
#!/usr/bin/python3
#
# Python functions start with def. They take parameters, which are
# un-typed, as other variables.
# The string at the start of the function is for documentation.
def prhello():
"Print hello"
print("Hello, World!")
prhello()
#
#
def prlines(str, num):
"Print num lines consisting of str, repeating str once more on each line."
for n in range(0,num):
print(str * (n + 1))
prlines('z', 5)
print()
prlines('fred ', 4)