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## closures
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### Instructions
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Using closures and iterators create a **function**, `first_fifty_even_square` that returns the first 50 even numbers squared.
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in a `Vec<i32>`.
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### Notions
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[Iterators and Closures](https://doc.rust-lang.org/book/ch13-00-functional-features.html)
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### Expected Functions
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```rust
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fn first_fifty_even_square() -> Vec<i32> {
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}
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```
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### Usage
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Here is a program to test your function.
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```rust
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use closures::*;
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fn main() {
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println!("Hello, world!");
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let v1 = first_fifty_even_square();
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println!("All elements in {:?}, len = {}", v1, v1.len());
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}
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```
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And its output:
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```console
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student@ubuntu:~/[[ROOT]]/test$ cargo run
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All elements in [4, 16, 36, ..., 10000], len = 50
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student@ubuntu:~/[[ROOT]]/test$
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```
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