Adding Numbers

Published by Leah Rappaport in
conditionsmathnumbers

Create a function that takes two number strings and returns their sum as a string.

Examples

add("111", "111") ➞ "222"

add("10", "80") ➞ "90"

add("", "20") ➞ "Invalid Operation"

Notes

If any input is "" or None, return "Invalid Operation".

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