I was asked a question on parameter passing today. So we came up with mnemonic to try and help you out.

Knowledge to remember

• By Reference = Input/Output = Changing the value of the original data
• By Value = Input = Changing the copy of the data.

Mnemonic – Remember you only need to remember one way to work out the reverse.

• PRO – Passing Reference Original/Output
• PVC – Passing Value Copy