The problem states adding two arrays by the question it means adding i’th component of one array to the i’th component of the second array but in the given example in the problem statement itself it doesn’t follow it. Kinda confused with the problem statement, please elaborate.
Problem statement in unclear
For the given sample case , arr1=[1, 0, 2, 9] and arr2=[3, 4, 5, 6, 7] .Each element of both the arrays is a digit .Thus, both array forms two separate numbers and we need to calculate the sum of these two numbers.
Take an ans array (whose size is equal to the (max size of the two arrays +1 )) which will store the final number formed.
Start adding both the numbers digit by digit from the end i.e. 9+7=16 thus 6 is stored in the ans array at last index (as we are updating our array from last) and 1 is taken as carry.Thus, this process is repeated for every digit and at the end if carry is not 0 it is stored at the starting index of the ans array.First digit of the ans array represent carry over which is zero in this case. So ans is [3, 5, 5, 9, 6].
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