Course of Raku / Functional, concurrent, reactive, and web programming / Functional programming / Recursion / Exercises

Count up

Problem

Write a recursive subroutine countup that prints the numbers from 1 up to $n, each on its own line. The trick: recurse first, then print — so the numbers come out in increasing order even though each call handles the largest number. Call countup(3).

Example

The program prints:

1
2
3

Solution

✅ See the solution

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