javascript alert(0217) when this alert is called the number is changed to 143 tried it with multiple other numbers 0817 and the alert is correct 817

Question

The reason being is that when you pass this number through to a function(a) a dose not read 217 it reads 143, needing the 0 in front, I just turned it in to a string but it is an weird error. I've had one other years ago with JavaScript and numbers?

because it is octal when it is a leading zero. If you need the leading zero, you need to make it a string. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#octal_numbers — epascarello, Aug 31 '21 at 20:46

score 0 · Answer 1 · answered Aug 31 '21 at 20:47

0

Numbers that start with 0 are considered to be octal numbers. 0817 is not a valid octal number, so it's handled as a decimal number instead.

0217 is a valid octal number, and it is equal to 143 in decimal representation.

answered Aug 31 '21 at 20:47

pelmetennui

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javascript alert(0217) when this alert is called the number is changed to 143 tried it with multiple other numbers 0817 and the alert is correct 817

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