General system functions are described here.
The GetEnv function returns the value of the environment variable.
Print( GetEnv("PATH"))// the same asPrint( $PATH )
The SetEnv function assigns the specified value to the environment variable.
SetEnv("MYVARB", true)SetEnv("MYVARI", 101)SetEnv("MYVAR", "Test value")// the same as$MYVARB = true$MYVARI = 101$MYVARI = "Test value"
The UnsetEnv function removes the environment variable.