How to call a Javascript function expression

Question

Can someone please help me understand how to call this JS function expression

var math = {
    'factorial': function factorial(n) {
        if (n <= 1)
            return 1;
        return n * factorial(n - 1);
    }
};

math.factorial(n).

RobG
– RobG

2015-01-19 02:13:04 +00:00
Commented Jan 19, 2015 at 2:13 — RobG
– RobG, Commented Jan 19, 2015 at 2:13
Indentation is so 2014

SeanCannon
– SeanCannon

2015-01-19 02:14:34 +00:00
Commented Jan 19, 2015 at 2:14 — SeanCannon
– SeanCannon, Commented Jan 19, 2015 at 2:14

Lee Taylor · Accepted Answer · 2015-01-19 02:19:06Z

1

Here you go. Should be self-evident:

var math = 
{
    'factorial': function factorial(n) 
    {
        if (n <= 1)
          return 1;
        return n * factorial(n - 1);
    }
};

var result = math.factorial(3);

// For the purposes of illustration, we will use document.write to output 
// the result. document.write is generally not a good idea, however!

document.write(result);

edited Jan 19, 2015 at 2:19

answered Jan 19, 2015 at 2:12

Lee Taylor

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2 Comments

undefined Over a year ago

It may be worth noting that the quotes around factorial are not necessary :)

Lee Taylor Over a year ago

That's the same code from the OP's question. The comment would be better there...

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