comma in javascript for loop conditional statement [duplicate]

Question

Time for some more education.

I've come across a javascript 'for loop' which loops through a nested object. What does the ,10 portion, represent in the condition statement?

 for (var x = 0; x < parseInt(myObj[myCategory][MySubCategory]['amount'], 10); x++)
 {
// stuff happens
}

I am not finding any documentation that talks about this so I presume I'm just unclear on what I would even search on. Thanks.

This would've been much cleaner (and possibly more efficient) if they had put var length = parseInt(myObj[myCategory][MySubCategory]['amount'], 10); in front of the loop, then have a x < length condition. — Bergi
– Bergi, Commented Sep 21, 2019 at 20:27

Lonnie Best · Accepted Answer · 2019-09-21 20:52:31Z

1

Notice, in your example, that 10 is the 2nd argument of the parseInt function.

The ,10 is for specifying a base of 10.

You'd think base 10 would be the default, but it isn't; you need to specify this each time you call the parseInt function.

answered Sep 21, 2019 at 20:27

Lonnie Best

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