Getting and Setting Environment Variables
The variables can be used both in scripts and on the command line. They are usually referenced by putting special symbols in front of or around the variable name. For instance, to display the user home directory, in most scripting environments, the user has to type:
echo $HOMEOn DOS, OS/2 or Windows systems, the user has to type this:
echo %HOME%In Windows PowerShell, the user has to type this:
Write-Output $HOMERead more about this topic: Environment Variable
Famous quotes containing the words setting, environment and/or variables:
“it is finally as though that thing of monstrous interest
were happening in the sky
but the sun is setting and prevents you from seeing it”
—John Ashbery (b. 1927)
“In a land which is fully settled, most men must accept their local environment or try to change it by political means; only the exceptionally gifted or adventurous can leave to seek his fortune elsewhere. In America, on the other hand, to move on and make a fresh start somewhere else is still the normal reaction to dissatisfaction and failure.”
—W.H. (Wystan Hugh)
“The variables of quantification, ‘something,’ ‘nothing,’ ‘everything,’ range over our whole ontology, whatever it may be; and we are convicted of a particular ontological presupposition if, and only if, the alleged presuppositum has to be reckoned among the entities over which our variables range in order to render one of our affirmations true.”
—Willard Van Orman Quine (b. 1908)