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fn main(){
// create some arrays
let numbers = [5,10,15];
let animals = ["cat","dog","fox","koala"];
let letters = ["A","B","C","D","E"];
// print length of arrays
println!("Length of numbers array: {}", numbers.len());
println!("Length of animals array: {}", animals.len());
println!("Length of letters array: {}", letters.len());
}