fn main() {
    
    // Regular function
    // function name:             add_one
    // function input parameter   (x: i32)
    // function return value:     -> i32

    //Regular functions never need a semicolon after their closing brace - 
    //  they are declarations, not statements.
    
    fn add_one(x: i32) -> i32 {
        x + 1
    }

    // Closure that does the same thing
    // closure name:              add_one_closure
    // closure input parameter:   |x|     //parameter in pipes

    //When you assign a closure to a variable using let, 
    //    it is a statement that always needs a semicolon.
    
    let add_one_closure = |x| -> i32 {
        x + 1
    };

    let add_one_closure_v2 = |x| {
        x + 1
    };
    
    // Both can be called the same way
    println!("Function result: {}", add_one(5));
    println!("Closure result: {}", add_one_closure(5));
    println!("Closure result: {}", add_one_closure_v2(6));
    
}