projects / OpenSPARC-T2-DV / blame
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| 54 | ||
| 55 | <H1><A NAME="SECTION009200000000000000000"></A><A NAME="while"></A> | |
| 56 | <BR> | |
| 57 | 7.2 The <tt class="keyword">while</tt> statement | |
| 58 | </H1> | |
| 59 | <a id='l2h-576' xml:id='l2h-576'></a><a id='l2h-577' xml:id='l2h-577'></a> | |
| 60 | <P> | |
| 61 | The <tt class="keyword">while</tt> statement is used for repeated execution as long | |
| 62 | as an expression is true: | |
| 63 | ||
| 64 | <P> | |
| 65 | <dl><dd class="grammar"> | |
| 66 | <div class="productions"> | |
| 67 | <table> | |
| 68 | <tr> | |
| 69 | <td><a id='tok-while_stmt' xml:id='tok-while_stmt'>while_stmt</a></td> | |
| 70 | <td>::=</td> | |
| 71 | <td>"while" <a class='grammartoken' href="Booleans.html#tok-expression">expression</a> ":" <a class='grammartoken' href="compound.html#tok-suite">suite</a></td></tr> | |
| 72 | <tr> | |
| 73 | <td></td> | |
| 74 | <td></td> | |
| 75 | <td><code>["else" ":" <a class='grammartoken' href="compound.html#tok-suite">suite</a>]</code></td></tr> | |
| 76 | </table> | |
| 77 | </div> | |
| 78 | <a class="grammar-footer" | |
| 79 | href="grammar.txt" type="text/plain" | |
| 80 | >Download entire grammar as text.</a> | |
| 81 | </dd></dl> | |
| 82 | ||
| 83 | <P> | |
| 84 | This repeatedly tests the expression and, if it is true, executes the | |
| 85 | first suite; if the expression is false (which may be the first time it | |
| 86 | is tested) the suite of the <tt class="keyword">else</tt> clause, if present, is | |
| 87 | executed and the loop terminates. | |
| 88 | <a id='l2h-578' xml:id='l2h-578'></a> | |
| 89 | <P> | |
| 90 | A <tt class="keyword">break</tt> statement executed in the first suite terminates the | |
| 91 | loop without executing the <tt class="keyword">else</tt> clause's suite. A | |
| 92 | <tt class="keyword">continue</tt> statement executed in the first suite skips the rest | |
| 93 | of the suite and goes back to testing the expression. | |
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| 131 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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