[SOLVED] "who am i" providing no output in my terminal

I am following Christopher Negus's Linux Bible to learn linux. In the 3rd Chapter under "Choosing Your Shell" it is given that if I give

Code:$who am ithen the output will be
Code:$chris pts/0 2019-10-21 22:45 (:0.0)But in my case or in my terminal which is a bash shell when I am putting
Quote:

username@systemname:~$ who am i

Quote:

username@systemname:~$

nothing is coming like the way it is given in the book. Why? Is it because I am already able to see my username@systemname