Functions

• You can define your own functions:

function square(x) {
        return x * x;
}

• Or, do it the lambda way:

var square = function (x) {return x*x};

square(5);

• More fun: (more later)

var plusone = function (x) {return x+1};
var doublef = function (f,x) {return f(f(x))};

doublef(plusone,5)