hmm.. you can use

Code (Skript):

1. on leftclick on player

but skript logs error:

so for rightclick:

Code (Skript):

1. on rightclick on player

and for leftclick:

Code (Skript):

1. on damage

you can add condition:

Code (Skript):

1.  
2. on damage:
3.     attacker is player
4.     victim is player
5.  

 

its that

Code (Skript):

1. #"I want it to tell if I am clicking on player or not."
2. on damage:
3.     if attacker is player:
4.         if victim is player:
5.             broadcast "You clicked on player: %victim%" #YES
6.         else:
7.             broadcast "You clicked on entity: %victim%" #NO

 

ohhh oke wait a minute

--- Double Post Merged, May 22, 2018, Original Post Date: May 22, 2018 ---

Code (Skript):

1. on leftclick:
2.     if gamemode of player is survival:
3.         loop players in radius 3.5 around player:
4.             set {_h} to true
5.         if {_h} is true:
6.             broadcast "&cYou miss player!"

maybe this..
but you need to put thre som conditions.. like world.. or if you want it for PvP make {pvp.joined::%player%} variable and check if is player conected

 

ye.. i.. ohh god.. -_-.. i forgot... sry
try this:

Code (Skript):

1. on leftclick:
2.     if clicked entity is set:
3.         if gamemode of player is survival:
4.             loop players in radius 3.5 around player:
5.                 set {_h} to true
6.             if {_h} is true:
7.                 broadcast "&cYou miss player!"

or this is better:

Code (Skript):

1. on damage:
2.     if victim is player:
3.         if attacker is player:
4.             set {combat.hit::%attacker%} to victim
5.             wait 2 ticks
6.             delete {combat.hit::%attacker%}
7.    
8. on leftclick:
9.     if gamemode of player is survival:
10.         if {combat.hit::%player%} is not set:
11.             loop players in radius 3.5 around player:
12.                 set {_h} to true
13.             if {_h} is true:
14.                 broadcast "&cYou miss player!"

 

Yeah, there isn't exactly a general singular event you can use to do this without some sort of weird code. To properly detect if they hit a player you'll need to use a damage event but to detect any click you'll need a general left click event. A solution like @MusicManSK's second example in the last post is basically what you'd need -- a variable to let you know cross-event whether or not the player damaged with that same click.

 

you can use a target entity

Code (Skript):

1. on leftclick:
2.     if distance between target and player is smaller than 3.5:
3.         broadcast "%target entity%"