#### The error comes when the sum of the numbers is negative, because the – causes an error because data isn’t the same type of date

#My task is to create a function called sum_arrays(), which takes two arrays consisting of integers, and #returns the sum of those two arrays.

#The twist is that (for example) [3,2,9] does not equal 3 + 2 + 9, it would equal ‘3’ + ‘2’ + ‘9’ #converted to an integer for this kata, meaning it would equal 329. The output should be an array of the #the sum in a similar fashion to the input (for example, if the sum is 341, you would return [3,4,1])

#[3,2,6,6],[-7,2,2,8] –> [-3,9,6,2] # 3266 + (-7228) = -3962

``````def sum_arrays(array1,array2):
i = ""
a = ""
b = []
if array1 == [] and array2 == []:
return []
elif array1 == []:
return array2
elif array2 == []:
return array1
else:
for x in array1:
i += str(x)
for y in array2:
a += str(y)
sum = int(i) + int(a)
if sum > -1:
word = str(sum)
for z in word:
p = int(z)
b.append(p)
return b
else:
word = str(sum)
for z in word[1:]:
p = int(z)
b.append(p)
l = b[0] * -1
b.append(l)
return b[1:-1]

print(sum_arrays([3, 2, 9], [1, 2]))
print(sum_arrays([4,7,3],[1,2,3]))
print(sum_arrays([],[]))
print(sum_arrays([-9, 8],[0, 2, 0]))
print(sum_arrays([-9, 8, 3, 4],[0, 2, 0, 8]))
``````

Source: Python Questions