If you want to run some JavaScript to see how it works, like here Wes has typed 1 + 1 and hit enter and the console returned 2. ! [] (../attachments/8.png) 00:27 This right here is a JavaScript ...

The number of arguments a function takes. From words like unary, binary, ternary, etc. A closure is a scope which captures local variables of a function for access even after the execution has moved ...