The cond statement

Account.transfer_amount(123535353, 252224, 150.40) -> {:ok, "Success"}
                                                -> {:error, "Failure"}

Transfer Depends on Validation

The validation for a transfer involves the amount transferred and the hour of the day.

defmodule Account do
    def transfer_amount(from_amount, to_account, amount) do
        hourOfDay = DateTime.utc_now.hour

        if ! valid_transfer?(amount, hourOfDay) do
            {:error, "Invalid Transfer"}
        else
            perform_transfer(from_account, to_account, amount)
        end

    end
end

The cond statement

def valid_transfer?(amount, hourOfDay) do
    cond do
        hourOfDay < 12 -> amount <= 5000
        hourOfDay <18 -> amount <= 1000
        true -> amount <= 300
    end
end