You can use parenthesis around any expression, as in most languages. eg something like: bank balanceOf: (bank findAccount: #savings) However, parens aren'

You can use parenthesis around any expression, as in most languages. eg something like: bank balanceOf: (bank findAccount: #savings) However, parens aren't necessary when a nested message takes no arguments, or uses a binary selector. eg: bank withdraw: 3 + 4 from: user checkingAccount There are 3 messages here. 1. 3 + 4 (execute method + with argument 4) 2. user checkingAccount (getter with no arguments) 3. bank withdraw: <result of #1> from: <result of #2>