FAQ: Virtual Computer - What You'll Be Building

This community-built FAQ covers the “What You’ll Be Building” exercise from the lesson “Virtual Computer”.

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This exercise can be found in the following Codecademy content:

Learn Ruby

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In the output I see a bug:
The users are given by username and password. The password of the first person is not correct. It is 668 instead of 01234. I am curious what is causing this.

Good eye.

4 * 80 + 3 * 81 + 2 * 82 + 1 * 83 = 668


Why and how does this happen? Is it because of the zero at the start of the number?

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Yes! The 0 denotes octal.

You can read more from the Ruby Documentation (https://docs.ruby-lang.org/en/2.5.0/syntax/literals_rdoc.html)

For decimal numbers use a prefix of 0d , for hexadecimal numbers use a prefix of 0x , for octal numbers use a prefix of 0 or 0o , for binary numbers use a prefix of 0b .

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