sequential search calculator
def sequential_search(alist, item):
position = 0
while position < len(alist):
if alist[position] == item:
return True
position = position + 1
return False
testlist = [63, 45, 32, 98, 46, 57, 28, 100]
sequential_search(testlist, 3) # => False
sequential_search(testlist, 13) # => True