PythonCourse/Section_04/assignment_08.py at master · hashim-github/PythonCourse

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# Assignment 8

"""

Return the sum of the numbers in the list, except ignore sections of

numbers starting with a 7 and extending to the next 8

(every 7 will be followed by at least one 8).

Return 0 for no numbers.

EXAMPLE:

sum78([1, 2, 2]) → 5

sum78([1, 2, 2, 7, 99, 99, 8]) → 5

sum78([1, 1, 7, 8, 2]) → 4

"""

def sum78(nums):

sum = 0

in_range = False

for i in range(len(nums)):

if nums[i] == 7:

in_range = True

if in_range == False:

# sum = sum + nums[i]

sum += nums[i]

if nums[i] == 8:

in_range = False

return sum

print(sum78([1, 2, 2])) #→ 5

print(sum78([1, 2, 2, 7, 99, 99, 8])) #→ 5

print(sum78([1, 1, 7, 8, 2])) #→ 4

# Solution:

# def sum78(nums):

# sum = 0

# inRange = False

# for i in range(len(nums)):

# if nums[i] == 7:

# inRange = True

# if not inRange:

# sum += nums[i]

# if inRange and nums[i] == 8:

# inRange = False

# return sum