functions

[Bookcliff]

• [x] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions#constructor_vs._declaration_vs._expression
• [x] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions
• [x] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function
• [x] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Default_parameters
• [x] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments

[RusseII]

reopening please do

• [x] functions