Problem 815. Persistent Usage

This Challenge is to implement the Matlab Persistent variable capability.
Given a sequence of Calls to a function return the current input summed with the prior function call input.
On the first call return the current input.
Input: a (value)
Output: b where b=a+"previous a"
Example:
Input Sequence: 1 2 -3 3 5
Output Sequence: 1 3 -1 0 8
Related Challenge is Global.
Solve

Solution Stats

31.79% Correct | 68.21% Incorrect
Last Solution submitted on Nov 10, 2025

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