A variable's name versus its value

A common mistake is to forget to use $ before the name of a variable. When you do this, the shell uses the name you have typed rather than the value of that variable.

A more common mistake for experienced users is to mis-type the variable's name. For example, if you define datasets like this:

datasets=seasonal/*.csv

and then type:

echo $datsets

the shell doesn't print anything, because datsets (without the second "a") isn't defined.

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If you were to run these two commands in your home directory, what output would be printed?

files=seasonal/*.csv
for f in files; do echo $f; done

(Read the first part of the loop carefully before answering.)