Linear Search Examples

sequence = ['A','B','C','D','E','F']
print('The sequence is', sequence , '\n')

# The enumerate function maps a number to each list item,
# and does not need a separate counter variable.
# It also allows some clever things.
#  ie. example enumerate(sequence,1) labels
#  each element starting at 1 rather than 0.
print("The entire list.\n")
for position, item in enumerate(sequence,1):
    print(item, " is at position ", position,".", sep="")
print('\n\n')

print('Using a while loop to search for the \'C\'.')
#Example 1 - A while loop
position = 0
while position < len(sequence):
    if (sequence[position] == 'C'):
        print(sequence[position], " is at position ", str(position + 1),".", sep="")
    position += 1

print('\n')
print('Using a for loop to search for the \'F\'.')
#Example 2 - A for loop over a range
for position in range(len(sequence)):
          if (sequence[position] == 'F'):
            print(sequence[position], " is at position ", str(position + 1),".", sep="")

print('\n')
print('Using the Python enumerate function to search for \'B\'.')
#Example 3 - The enumerate function

for position, item in enumerate(sequence,1):
    if (item == 'B'):
        print(item, " is at position ", position,".","\n\n", sep="")