getenv « char « C Data Type Q&A

1. Should I free/delete char* returned by getenv()?    stackoverflow.com

 char * val;                            ...

2. What can be the parameters to char getenv(const char *name);?    stackoverflow.com

I looked over various documentation on getenv(), all they describe is how to use it and what it does i.e environment variable whose name is specified as argument. But, I am trying ...