Solution for Linear Search
def answer(list, key):
if len(list) <= 0:
return -1
if len(list) == 1:
return 0
if key == list[0]:
return 1
length = len(list)
if key == list[length -1]:
return length-1
position = 0
for position in range(len(list)):
if list[position] == key:
return position
return -1
