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arrayaddition.py

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def add(arr1, arr2):

l = max(len(arr1), len(arr2))

result = [0 for j in range(l)]

c = 0

i = len(arr1) - 1

j = len(arr2) - 1

r = 0

l -= 1

while i >= 0 and j >= 0:

r = arr1[i] + arr2[j] + c

i -= 1

j -= 1

c = r // 10

result[l] = r % 10

l -= 1

while i >= 0:

r = arr1[i] + c

i -= 1

c = r // 10

result[l] = r % 10

l -= 1

while j >= 0:

r = arr1[j] + c

j -= 1

c = r // 10

result[l] = r % 10

l -= 1

if c != 0:

new_result = [0 for j in range(len(result) + 1)]

t = len(new_result) - 1

while t > 0:

new_result[t] = result[t - 1]

t -= 1

new_result[0] = c

return new_result

return result

arr1 = [9, 9, 9, 9, 9, 9, 9]

arr2 = [1, 6, 8, 2, 6, 7]

result = add(arr1, arr2)

print(result)