SproutStack🌱 DSA (Beginner) · Warmup (Code Confidence) · cozy lesson
Recursion Intuition
10 min · 1 min read · no scary math, promise
🤖
You’ve got this. Read a little, play a little — I’ll wait. No rush.
def fact(n):
if n <= 1: return 1 # base
return n * fact(n-1) # leap of faith
def fib(n):
if n <= 1: return n
return fib(n-1) + fib(n-2)
Think: “If child returns right, can I finish?” Draw 1 level, trust rest. Next: memoize fib to O(n).
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Check your understanding
Correct answers earn XP (once each).
1. Recursion needs…
2. Stack overflow from?
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