Practice · 4 of 4

Diagnose a trace bug

CHALLENGE

Difficulty: intermediate+25 XP

This method should return 1 + 2 + ... + n for n >= 1 (and 0 for n <= 0), but its loop never terminates correctly for some inputs. Trace sumTo(3) and sumTo(-1) with a state table, find the drift, and fix it.

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Back to lesson: Practice: Tracing lab