After installation process, the following lines should be entered in mongo shell (client terminal).
> db.world.insert({ "speech" : "Hello World!" });
> cur = db.world.find();x=cur.next();print(x["speech"]);
Hello World!
Explanation:
{ key : value } paired document in the default database test and in the collection named world.cur. Then by the next() function, we retrieved the first and only document and kept it in another js variable named x. Then printed the value of the document providing the key.