I have a script file like this: #!/bin/bashclear echo The script starts now.echo Hi, user!echo echo I will now fetch you a list of connected users:echo wecho I'm setting two variables now.COLOUR=blackVALUE=9echo This is a string: $COLOURecho And this is a number: $VALUEecho I observed that the effect of w is that it prints the following: 18:06:36 up  7:43,  3 users,  load average: 0.40, 0.56, 0.64USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAThes      tty7                      10:23    7:43m 12:31   0.96s gnome-session -hes      pts/0    :0               15:41    4.00s  1.38s 11.46s gnome-terminalhes       pts/2    :0               17:20   44:52   0.79s 11.46s gnome-terminalwhen I typed echo  statement in terminal , it prints the statement. But I could not understand w here. in terminal echo w , prints w not as above.I am a beginner in scripting, so can someone help me in understanding how this work? 
Printing connected users in bash script
bash