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Add additional comment to explain 03_if/if3 solution #2400

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5 changes: 5 additions & 0 deletions exercises/03_if/if3.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,10 @@
fn animal_habitat(animal: &str) -> &str {
// TODO: Fix the compiler error in the statement below.
//
// Hint: every `if` / `else if` / `else` branch must produce the same type.
// A floating-point literal, a string, and integers cannot be mixed in one chain.
// For unknown animals, use another integer identifier (for example `4`) instead of
// a string, then keep the habitat checks below unchanged.
let identifier = if animal == "crab" {
1
} else if animal == "gopher" {
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