<faceprint> we returned js->roomlist without setting it, so it was NULL
'variable' would have a value of NULL until it is initialized, and 'function' would return NULL because it was created with a 'void' data type.)
"Your sister is soooo stupid, it's like she's NULL between the ears..."
2. The command prompt asked me to type my name. I hit 'Enter' without typing a name, and on the webpage, it said 'Hello, null! Welcome to my site!'
NULL is the value that we can not define. This is special value used in db that is given to the field when no value was assigned. In practical life we can consider it as no value. It is not zero, it is not letter or any other character this is something that can not be used.