Defined in header <stdlib.h>
const char *getenv( const char *env_var );
Searches for an environmental variable with name
env_var in the host-specified environment list and returns information associated with it. The set of environmental variables and methods of altering it are implementation-defined.
|env_var||-||null-terminated character string identifying the name of the environmental variable to look for|
 Return value
character string identifying the value of the environmental variable or NULL if such variable is not found.
|This section is incomplete|
Reason: no example
 See also
C++ documentation for getenv