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:
“something far more deeply interfused,
Whose dwelling is the light of setting suns,”
—William Wordsworth (1770–1850)
“People between twenty and forty are not sympathetic. The child has the capacity to do but it can’t know. It only knows when it is no longer able to do—after forty. Between twenty and forty the will of the child to do gets stronger, more dangerous, but it has not begun to learn to know yet. Since his capacity to do is forced into channels of evil through environment and pressures, man is strong before he is moral. The world’s anguish is caused by people between twenty and forty.”
—William Faulkner (1897–1962)
“Science is feasible when the variables are few and can be enumerated; when their combinations are distinct and clear. We are tending toward the condition of science and aspiring to do it. The artist works out his own formulas; the interest of science lies in the art of making science.”
—Paul Valéry (1871–1945)