Curriculum Foundations Compiler feedback exercise 5 · fill-word
Compiler feedback
rustc says: expected f64, found integer. The bug is the
annotation on the LEFT of =. Fill the corrected type so the
literal 0.5 lines up with the annotation.
TypeScript reference
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About this theme
Rust is learned with the compiler, not around it. Before ownership starts, learners need the habit of reading error[E...], spans, notes, and help: suggestions. Planned exercises: 1. identify the primary error line. 2. recognise a help: suggestion. 3. choose the fix for a type mismatch. 4. fill a corrected variable name. 5. fill a corrected type. 6. apply a compiler hint to one line. 7. explain why a warning is not an error. 8. fix a short program from a rustc diagnostic. 9. use the diagnostic to repair a function.