title: Deleting a certain amount of variables(not all not one) with one command in bash scripting
body: <p>if I create 9 variables <code>programming=good</code> <code>l=20</code> and <code>value=56</code> ...etc and etc and if try of deleting a certain amount of variables then comes the problem I already know the command line <code>unset</code> but it will consume more time if I tried to delete each one of them so, I need a command line of deleting a certain amount of variables to reduce consumption of time in bash scripting</p>