numeric cycles in shell

Posted by oraz on Stack Overflow See other posts from Stack Overflow or by oraz
Published on 2010-04-18T03:59:45Z Indexed on 2010/04/18 4:03 UTC
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shell

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command-line

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bash

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cycle

hello, what is the name and sintacsys of construcion ((..)) in example below?

for ((i=1;i<10;i++)) do echo $i; done

it has strange variable i
where are other constructons for numeric cycling in shell?

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