squares = [1, 4, 9, 16]
sum = 0
for num in squares:
    sum += sum
print sum ## 30

# list example 2
list = ['larry', 'curly', 'moe']
if 'curly' in list:
    print 'yay'
list.append('shemp')
list.insert(0, 'xxx')
list.extend(['yyy', 'zzz'])
print list
print list.index('curly')

list.remove('curly')
list.remove('moe')
list.pop(1)
print list #Just prints additions

#loop/for example
for i in range(10):
    print i

list = [1, 2, 3]
list.append(4)
print list # prints 1, 2, 3, 4

# list buildup
list = []
list.append('a')
list.append('b')

# list slices
list = ['a', 'b', 'c', 'd']
print list [1:-1] # b & c
list [0:2] = 'z'
print list # z, c, d