How do I detect if more than 2 players are online with command blocks? [duplicate]

In Minecraft 1.14.4, I and my friend want to make a custom map and we need to detect if there are at least 2 players online with command blocks.

Is there any way to do that?

You can solve this problem using scoreboards. In an impulse command block put this command:

/scoreboard objectives add playercount dummy "playercounter"

Then connect 4 chain command blocks set to always active, in the first one put this command:

/execute as @a run scoreboard players add x playercount 1

___________________________Second__________________________________

/execute if score x playercount matches 2.. run *"your command here"*

____________________________Third________________________________

/execute if score x playercount matches ..2 run tellraw @a {"text":"There are not enough players","color":"red"}

_________________________Fourth__________________________________

/scoreboard players reset x playercount