Why does Javascript change the 0111 number parameter to 73

Question

I guess this has something to do with binary numbers but I have not been able to find anything explaining why, most likely because I don't know what to search for. I have the following code. I pass in a number parameter of 0111 and inside the function body it logs the number 73. Im just trying to learn why. Linked resources with explanation would be nice. Thanks.

function whatTheHecksGoingOn(num) {
    console.log(num)
}

whatTheHecksGoingOn(0111);

score 0 · Accepted Answer · answered Oct 05 '19 at 13:18

0

Numericl literals beginning with 0 in JavaScript are interpreted as being in Octal notation. 0111 in Octal is equivalent to 73.

answered Oct 05 '19 at 13:18

Dan

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It's octal, not hex. `0x` is the hex prefix – VLAZ Oct 05 '19 at 13:19
Already corrected, mb. I posted this answer right before the question was closed, woops. – Dan Oct 05 '19 at 13:19

Why does Javascript change the 0111 number parameter to 73

1 Answers1