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| <title>Tcl Example #2</title> |
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| <? prevnext "<h1>Tcl Example #2</h1>" ?> |
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| Something you can't do in Perl, Python or PHP is create new |
| command structures: |
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| <pre> |
| <span class="keyword">proc</span> <span class="function-name">do</span> {body <span class="keyword">while</span> expression} { |
| <span class="keyword">uplevel</span> $body |
| <span class="keyword">while</span> { [uplevel expr $expression] } { |
| <span class="keyword">uplevel</span> $body |
| } |
| } |
| |
| set i 0 |
| do { |
| puts $i |
| incr i |
| } <span class="keyword">while</span> {$i < 0}</pre> |
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