Code shared from the Rust Playground

playground.rs

fn main() {
let mut array: [String; 7] = Default::default();
attempt(&mut array);
println!("{:?}", array);
}

fn attempt(array: &mut [String]){
    let a = "amit".to_string();
    array[0] = a;
    array[1] = "mom".to_string();
    array[2] = "dad".to_string();
    array[3] = "grandma".to_string();
    array[4] = "grandad".to_string();
    array[5] = "grandam1".to_string();
    array[6] = "grandad2".to_string();
}