http://coderwiki.org/index.php?action=history&feed=atom&title=Code_block 2026-05-19T02:45:17Z Revision history for this page on the wiki MediaWiki 1.44.0 http://coderwiki.org/index.php?title=Code_block&diff=156&oldid=prev 2025-08-21T13:53:26Z

<p>new: info, uses, evaluation</p> <p><b>New page</b></p><div>A &#039;&#039;&#039;code block&#039;&#039;&#039; is a section of [[source code]] that is &#039;&#039;isolated&#039;&#039; in some way from other parts of the [[program]].<br /> <br /> This often means that [[Variable|variables]] that are [[Variable declaration|declared]] &#039;&#039;inside&#039;&#039; the code block cannot be referenced &#039;&#039;outside&#039;&#039; the code block. But code blocks can have other functions.<br /> <br /> == Uses of code blocks ==<br /> <br /> * Declaring the body of a [[subroutine]]<br /> * Declaring the body of an [[if statement]], [[switch statement]] or other [[Condition|conditional statement]]<br /> * Declaring the body of a [[while loop]], [[for loop]] or other [[Iteration|iterative statement]]<br /> <br /> == Evaluation ==<br /> In some [[Programming language|languages]] such as [[Rust]], code blocks have another use: to [[Evaluation|evaluate]] multiple [[Statement|statements]] down to a single [[value]].<br /> <br /> Usually, the last [[statement]] in the &#039;&#039;&#039;code block&#039;&#039;&#039; is taken to be the [[value]] of the code block itself. Code blocks do not always [[Evaluation|evaluate]] to a [[value]] though.</div>

Dylan