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- <h1 id="firstHeading" class="firstHeading">Static storage duration</h1> <p>An object whose identifier is declared without the storage-class specifier <code>_Thread_local</code>, and either with external or internal <a href="storage_duration#Linkage" title="c/language/storage duration">linkage</a> or with the storage-class specifier <code>static</code>, has static storage duration. Its lifetime is the entire execution of the program and its stored value is initialized only once, prior to program startup.</p>
-<h3 id="Notes"> Notes</h3> <p>Since its stored value is initialized only once, an object with static storage duration can profile the invocations of a function.</p>
-<p>The other use of the keyword <code>static</code> is <a href="file_scope" title="c/language/file scope">file scope</a>.</p>
-<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdio.h&gt;
-
-void f (void)
-{
- static int count = 0; // static variable
- int i = 0; // automatic variable
- printf("%d %d\n", i++, count++);
-}
-
-int main(void)
-{
- for (int ndx=0; ndx&lt;10; ++ndx)
- f();
-}</pre></div> <p>Output:</p>
-<div class="text source-text"><pre data-language="c">0 0
-0 1
-0 2
-0 3
-0 4
-0 5
-0 6
-0 7
-0 8
-0 9</pre></div> </div> <div class="_attribution">
- <p class="_attribution-p">
- &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
- <a href="https://en.cppreference.com/w/c/language/static_storage_duration" class="_attribution-link">https://en.cppreference.com/w/c/language/static_storage_duration</a>
- </p>
-</div>