for loops tutorial for GSMST number theory

for.py

# what if we have a list, and we want to do something for each item.
nums = [12, 5, 7, 18, 127, -1337]
# we will print out each number squared

# this means: repeatedly take one element from the list "nums"
# call it "num"
# and do the stuff in the for loop body.
for num in nums:
    print num * num

for chan in nums:
    print chan * chan

# what if we want to write a loop that runs 10 times
i = 0
while i < 10:
    print i
    i += 1

# same thing as our for loop:
i = 0
while i < len(nums):
    print nums[i] * nums[i]
    i += 1

# instead, we can write
for i in xrange(10):
    print i

names = [] # this is [ ]. this is called a LIST
while True:
    name = raw_input('Enter a name: ')
    if name == 'quit':
        break
    names.append(name) # this adds "name" to the end of the list "names"

for name in names:
    print name + 'ACK'