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==Using templates==
===General===
Using a template is similar to calling a [[Function (computer programming)|function]] in programming. When called, it returns a value. For a template, calling is known as a ''template call'' and the return value is known as the ''expansion'' of the template, which is treated as part of the calling page's source. Like functions, some templates can take parameters that affect their output.
Calling a template causes it to be either ''transcluded'' or ''substituted'' in the page that calls it (the ''target page'').
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