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diff --git a/rustlings/exercises/23_conversions/using_as.rs b/rustlings/exercises/23_conversions/using_as.rs
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--- a/rustlings/exercises/23_conversions/using_as.rs
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-// Type casting in Rust is done via the usage of the `as` operator.
-// Note that the `as` operator is not only used when type casting. It also helps
-// with renaming imports.
-
-fn average(values: &[f64]) -> f64 {
- let total = values.iter().sum::<f64>();
- // TODO: Make a conversion before dividing.
- total / values.len()
-}
-
-fn main() {
- let values = [3.5, 0.3, 13.0, 11.7];
- println!("{}", average(&values));
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn returns_proper_type_and_value() {
- assert_eq!(average(&[3.5, 0.3, 13.0, 11.7]), 7.125);
- }
-}