Unreferenced variable: Difference between revisions

Revision as of 17:11, 15 June 2007

Revision as of 14:55, 12 November 2007

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An '''unreferenced variable''' in the [[source code]] of a [[computer program]] is a [[variable]] that is declareddefined but which is never used. This usuallymay resultsresult in a harmless waste of memory (unless the [[compiler]] used detects the situation and maydoes not allocate for the variable, perhaps provokeissuing a warning). from theSome language's[[coding compilerstyle|coding orguideline]] documents consider an unreferenced variable to be a potential symptom of a runtimecoding systemfault.

== Examples ==

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[[C (programming language)|C]]:

<code>

int main(void) {

{

int i, j;

for (i=0; i<10; i++)
printf("%d", i);

return 0;

}