# Your first iyi program. puts "Hello Türkiye!"
Press Run.
The pane no longer holds samples/tour/hello.iyi. Run executes hello.wasm, the module the compiler built from the recorded file, so your edit is not in this run: there is no iyi compiler in this page. How this works
recorded with iyi 0.18.0 (built on Crystal 1.22.0-dev [2a9653052] (2026-10-18)) · Linux 7.0.0-38-generic x86_64, QEMU Virtual CPU version 2.5+ · 2026-10-19
You can type in the pane: nothing here compiles, so what you type cannot run, and the page says which bytes it is running the moment the text stops being the recorded file. There is no standard input, no filesystem and no threads on this target, and one sample fails on purpose for exactly that reason.
Run executes hello.wasm, the module the compiler built from this file, in your browser. How this works
Try it on your machine
Copy the program into hello.iyi, change something, and run it. Only a compiler on your own machine can run what you wrote.
$ iyi run hello.iyi