Rust - Functions

 Functions:

fn keyword used to define a function

fn main(){

}

fn do_stuff(a:i23, b:i32) -> i32 {

return a+b;

}

fn do_stuff(a:i23, b:i32) -> i32 {

        a+b  // this will return automatically

}

variable number of arguments won't support in rust but macros support variable number of arguments 

println! is macro.