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finish iterators4 exercise

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lukaszKielar 2020-06-30 20:06:31 +02:00
parent e63c871147
commit 2a9bd74176
1 changed files with 1 additions and 2 deletions
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3
exercises/standard_library_types/iterators4.rs
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@ -1,7 +1,5 @@
// iterators4.rs // iterators4.rs
// I AM NOT DONE
pub fn factorial(num: u64) -> u64 { pub fn factorial(num: u64) -> u64 {
// Complete this function to return the factorial of num // Complete this function to return the factorial of num
// Do not use: // Do not use:
@ -12,6 +10,7 @@ pub fn factorial(num: u64) -> u64 {
// For an extra challenge, don't use: // For an extra challenge, don't use:
// - recursion // - recursion
// Execute `rustlings hint iterators4` for hints. // Execute `rustlings hint iterators4` for hints.
(1..num + 1).into_iter().fold(1, |acc, x| acc * x)
} }
#[cfg(test)] #[cfg(test)]