Head-First-JavaScript-Programming/chapter10/fun.html at master · Cnfc/Head-First-JavaScript-Programming

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<!doctype html>

<head>

function fun(echo) {

console.log(echo);

};

fun("hello");

function boo(aFunction) {

aFunction("boo");

}

boo(fun);

console.log(fun);

fun(boo);

var moreFun = fun;

moreFun("hello again");

function echoMaker() {

return fun;

}

var bigFun = echoMaker();

bigFun("Is there an echo?");

</script>

</head>

<body>

</body>

</html>