Can you have a transaction without a change output?

While reading about the fees here https://metamug.com/article/security/bitcoin-transaction-fee-satoshi-per-byte.html

The article said that “In the simplest case, you’ll have one input and two outputs (the recipient, and change). So in=1 and out=2.”

Does that mean that I cannot send the entire amount from one address to another? I thought that the simplest case is in=1 and out=1. And that in = out + fee