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diff --git a/solutions/02_functions/functions5.rs b/solutions/02_functions/functions5.rs
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+fn square(num: i32) -> i32 {
+ // Removed the semicolon `;` at the end of the line below to implicitly return the result.
+ num * num
+}
+
+fn main() {
+ let answer = square(3);
+ println!("The square of 3 is {answer}");
+}