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STUDENT NOTES · DAY 6 OF 24
Loop Tricks & Patterns 🌀
Loops inside loops, skipping the boring bits, and collecting totals — the tricks that turn loops into superpowers.
1A loop inside a loop
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Py: Think of a school timetable: for every DAY, go through every PERIOD. That's a loop inside a loop!
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Professor Hoot: The outer loop moves once; the inner loop runs ALL its rounds each time. 2 outer × 3 inner = 6 lines.
2continue — skip this one, keep going
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Bittu: continue = skip the rest of THIS round and move to the next. break = leave the loop completely. Different exits!
3The collector pattern
Start with an empty total, add to it every round — how programs sum anything:
4Star patterns! ⭐
Pyramid builder — slide the height!
height = 4
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5Quick quiz! 🧠
How many lines print?
for i in range(3):
for j in range(2): print(i, j)
for i in range(3):
for j in range(2): print(i, j)
💡 Outer runs 3 times, inner runs 2 per outer round: 3 × 2 = 6 lines.
Inside a loop, continue does what?
💡 It abandons the current round and jumps straight to the next one.
6Your mission 🚀
Mission 1: Print numbers 1–20, but SKIP all numbers divisible by 3 (hint: % and continue).
Mission 2: Add up all numbers from 1 to 100 with the collector pattern. (Check: it's 5050!)
Mission 3: Build an UPSIDE-DOWN star pyramid. 🙃
Day 6 done — pattern master! 🌀
Next: lists — one variable that holds a whole class of students.
Go to Day 7: Lists →