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

Sum a channel

Problem

Create a channel. In a background task (a start block), send the numbers 1..6 into it and then close it. In the main program, collect every value with .list and print their sum. This is the natural shape of a channel: a producer on one thread, a consumer on another.

Example

The program prints:

21

Solution

✅ See the solution

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