Are semicolons in JavaScript functions declarations ever necessary -

is ever necessary add semicolon @ end of function definition following

function helloworld() {      //some code  }; //note semicolon here @ end ever necessary? ever 

i have friend swears optional. think never optional have never read being optional @ end of function. have never seen 1 ever "except him". semi colon optional.

var hellworld = function (){  }; // semicolon here optional because defining variable ok , optional  

semicolons delimit expressions. can add amount of semicolons after one, since they'd delimiting empty statements.

function() {    // works. };;;;;;;;;;;;;;;;;;;;; 

that semicolon after function not "optional", it's plain redundant.

as optional ones, because javascript add semicolons before newlines in situations 1 needed. these should write explicitly. you'll bitten lack of auto-semicolon sooner or later.