How Linked Lists Helped One CS Student Finally Understand Recursion

A final-year software engineering student shares how linked lists became the key to understanding recursion while studying data structures and algorithms in C++. Unlike arrays, linked lists store elements as nodes with pointers to the next node, and their structure mirrors the definition of recursion — a list is either empty or a node followed by a smaller list. The student found that manually tracing the call stack, step by step, was what made recursive functions feel logical rather than abstract. A stack overflow crash caused by a missing base case also reinforced why every recursive function must have a stopping condition. The student recommends tracing a small linked list problem on paper, call by call, as a practical way to demystify recursion.