Bash workingdirectory use as variable

I need to some homework ... The Question is : How can you print the path of the current directory (working di开发者_如何学Crectory) and how can you use it as a variable?

The first part of the question is easly answered: pwd

But how can I use it as a variable ?

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Bash has a variable PWD which should be preferred over the pwd command:

echo "$PWD"

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In bash, you can execute a command and obtain the output using backticks, for example

paul@paul-laptop:~$ WORKING_DIRECTORY=`pwd`
paul@paul-laptop:~$ echo $WORKING_DIRECTORY
/home/paul

There is an alternate syntax too, using a dollar sign and brackets - WORKING_DIRECTORY=$(pwd)