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Diffstat (limited to 'source/lang/switchcase.rst')
| -rw-r--r-- | source/lang/switchcase.rst | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/source/lang/switchcase.rst b/source/lang/switchcase.rst index 46c47d8..b484bc5 100644 --- a/source/lang/switchcase.rst +++ b/source/lang/switchcase.rst @@ -2,12 +2,12 @@ .. _lang-switchcase: -switch / case statements -======================== +``switch``\ /\ ``case`` +======================= -Like :ref:`if/else <lang-else>` blocks, A ``switch`` statement -controls program flow by allowing you to specify different code that -should be executed under various cases. +Like :ref:`if <lang-if>` statements, A ``switch`` statement controls +program flow by allowing you to specify different code that should be +executed under various cases. The general syntax looks like this:: @@ -27,7 +27,6 @@ Where ``var`` is a variable whose value to investigate, and the ``val1``, ``val2`` after each ``case`` are constant values that ``var`` might be. - Description ----------- @@ -80,6 +79,8 @@ a ``break`` has been reached, so the program continues by calling ``afterTheSwitch()``. This is usually not what you want, which is why each ``case`` usually has a ``break`` at the end. +.. _lang-switchcase-default: + Writing "``default:``" instead of a ``case`` statement allows you to specify what to do if none of the ``case`` statements matches. Having a ``default`` is optional (you can leave it out), but if you have one, @@ -104,14 +105,14 @@ two, ``doThing2()`` gets called. If ``var`` is anything else, optional. If you're missing one and none of the ``case`` statements match, the ``switch`` does nothing at all, as if it weren't there. -``switch`` statements are often used with an ``enum`` value as the -variable to compare. In this case, you can write down all of the -values the ``enum`` takes as ``case`` statements, and be sure you've -covered all the possibilities. +``switch`` statements are often used with an :ref:`enum <lang-enum>` +value as the variable to compare. In this case, you can write down +all of the values the ``enum`` takes as ``case`` statements, and be +sure you've covered all the possibilities. See also: --------- -- :ref:`if...else <lang-else>` +- :ref:`if/else <lang-if>` .. include:: cc-attribution.txt |