Lessons
Befunge · Medium
Befunge · Medium. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
Pass all ten lessons for the certificate. Sample · Claim
Lesson 1 · On the house
Multi-digit arithmetic on the stack
Build numbers larger than 0–9.
Lesson 2
Structured branch diamonds
_ and | with honest rejoins.
Lesson 3
Random direction without chaos
? picks a cardinal; design for all four.
Lesson 4
Self-modifying control paths
p rewrites the road under the IP.
Lesson 5
Input with & and ~
Numbers and characters from the user.
Lesson 6
Stringmode machines
Quotes push ASCII; leave cleanly.
Lesson 7
A tiny stack calculator
Read two ints, operate, print.
Lesson 8
Medium debugging drills
IP, stack, and cell diffs.
Lesson 9
Hello with medium tools
Constants, stringmode, or both.
Lesson 10
Medium capstone: echo adder
Prompt, read, add, print, halt.
Sample certificate
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Certificate
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