cmc-csci143

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I am a bit confused regarding the result of Problem 19. @mikeizbicki

I typed in the command and got the result: echo.

lambda-server:~/quiz $ cd; rm -rf quiz; mkdir quiz; cd quiz
lambda-server:~/quiz $ var=$(echo $(echo echo))
lambda-server:~/quiz $ touch "$var"
lambda-server:~/quiz $ ls
echo

I wonder whether the result to be echo instead of 'echo', since the result from Problem 15 to Problem 18 are all including single quotes. Is that because echo is a single word?

Correct. ls adds the single quotes around the output only when there is a space in the filename. If there is no space in the filename, no quotes are added.