Work the Shell - Writing a Shell Game

Bash a little time away with Blackjack.

Dave Taylor has been hacking shell scripts for over thirty years. Really. He's the author of the popular "Wicked Cool Shell Scripts" and can be found on Twitter as @DaveTaylor and more generally at


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while or for ?

magnus.therning's picture

I can see how you'd like to use a while loop in your code, after all it's about shell scripting. However I think that in order to really unleash the full power of the shell one needs to know about the tools that are available. You missed an opportunity to introduce a useful tool in this column--seq.

You're while loop could have been written as a for loop using seq:

for card in `seq 52`; do

Why not use for?

Anton Olsen's picture

Why not use a for loop to increment the numbers?

for ((card=1;card<=52;card++));do

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