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(emacs-lisp-intro.info)set & setq

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Setting the Value of a Variable
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   There are several ways by which a variable can be given a value.
One of the ways is to use either the function `set' or the function
`setq'.  Another way is to use `let' (Note: let).  (The jargon for
this process is to "bind" a variable to a value.)

   The following sections not only describe how `set' and `setq' work
but also illustrate how arguments are passed.

Using set

Setting values.

Using setq

Setting a quoted value.

Counting

Using `setq' to count.