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#### 2.7.21 List Tutorial Exercise 3

Move to one end of the list and press `C-@` (or `C-SPC` or whatever) to set the mark, then move to the other end of the list and type `C-x * g` .

    1:  [2.3, 6, 22, 15.1, 7, 15, 14, 7.5, 2.5]
        .

To make things interesting, let’s assume we don’t know at a glance how many numbers are in this list. Then we could type:

    2:  [2.3, 6, 22, ... ]     2:  [2.3, 6, 22, ... ]
    1:  [2.3, 6, 22, ... ]     1:  126356422.5
        .                          .

        RET                        V R *

    2:  126356422.5            2:  126356422.5     1:  7.94652913734
    1:  [2.3, 6, 22, ... ]     1:  9                   .
        .                          .

        TAB                        v l                 I ^

(The `I ^` command computes the nth root of a number. You could also type `& ^` to take the reciprocal of 9 and then raise the number to that power.)