new main.bal

.bal

# Prints `Hello` with input string name.
#
# + name - the input sting name
# + return - "Hello " with the input string name

public function sayHello(string name) returns string {
    if !(name is "") {
        // We are adding "!" in the end and remove "," after hello as a bug fix.
        return "Hello " + name + "!";
    }
    return "Hello, World!";
}

# Prints `Bye` with input string name.
#
# + name - the input sting name
# + return - "Bye" with the input string name

public function sayBye(string name) returns string {
    if !(name is "") {
        return "Bye " + name + "!";
    }
    return "Bye, World!";
}