chapter2-Functions.html

<html>
<body>
<script type="text/javascript">

var x="A";

function setVarToB() {
    x="B";
}
setVarToB();
document.write(x);

var a=null;
function b() {
    return "B";
}

(a || b)();

(a || function(){return "B";})();

// Closure!
function createFunction() {
    var local=100;
    return function(){return local;}
}
createFunction()();

function makeAdder(amount) {
    return function(number) {
        return number+amount;   
    };
}
var addTwo=makeAdder(2);
document.write(addTwo(3));

// Optional Arguments
function power(base, exponent) {
    var result-1;
    if(exponent === undefined) exponent=2;
    for (var count=0;count<exponent;count++) {
        result *= base;
    }
    return result;
}

print("R",2,"D",2);

</script>
</body>
</html>