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Problem
Return 1 + 2 + … + n recursively (n >= 0). The AP exam emphasizes tracing recursion; writing simple base cases is good practice.
Examples
sumN(3) -> 6sumN(0) -> 0
Return 1 + 2 + … + n recursively (n >= 0). The AP exam emphasizes tracing recursion; writing simple base cases is good practice.
sumN(3) -> 6sumN(0) -> 0