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Problem with using "until" in "bash script"

I don't understand why it doesn't print 0 :

z=0 until (($z < 1)) do echo $z done

I don't understand why it prints 2 (2 is not less than 1) : output:

z=2 until (($z < 1)) do echo $z done

output:2

bash
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written by Fatima Fatima

You're confused with the while loop.

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written by Benn Benn

From that link:

The until loop is very similar to the while loop, except that the loop executes until the TEST-COMMAND executes successfully. As long as this command fails, the loop continues.

By the way this is not a bioinformatics question.

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written by Jean-Karim Heriche Jean-Karim Heriche

Yeah that's what I mean, it is kind of the opposite of while loop. OP seemed to expect while behavior.

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written by Benn Benn

Hello Afagh!

We believe that this post does not fit the main topic of this site.

Not a bioinformatics question

For this reason we have closed your question. This allows us to keep the site focused on the topics that the community can help with.

If you disagree please tell us why in a reply below, we'll be happy to talk about it.

Cheers!

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written by Lars Juhl Jensen Lars Juhl Jensen

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