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Sample  let Expression

The following expression creates and gives initial values to the two variables  zebra and  tiger . The body of the  let expression is a list which calls the  message function.

(let ((zebra 'stripes)
      (tiger 'fierce))
  (message "One kind of animal has %s and another is %s."
           zebra tiger))

Here, the varlist is  ((zebra 'stripes) (tiger 'fierce)) .

The two variables are  zebra and  tiger . Each variable is the first element of a two-element list and each value is the second element of its two-element list. In the varlist, Emacs binds the variable  zebra to the value  stripes , and binds the variable  tiger to the value  fierce . In this case, both values are symbols preceded by a quote. The values could just as well have been another list or a string. The body of the  let follows after the list holding the variables. In this case, the body is a list that uses the  message function to print a string in the echo area.

You may evaluate the example in the usual fashion, by placing the cursor after the last parenthesis and typing C-x C-e. When you do this, the following will appear in the echo area:

"One kind of animal has stripes and another is fierce."

As we have seen before, the  message function prints its first argument, except for `%s'. In this case, the value of the variable  zebra is printed at the location of the first `%s' and the value of the variable  tiger is printed at the location of the second `%s'.

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