How do I Measure Distance between two objects?

Hello, im trying to include an event where if a prisoner is to far away from a guard he will change color to notify the player but im lost at how to do it.

to get the distance you'd use:

distance(Player.X,Player.Y,Guard.X,Guard.Y)

so then you could do:

Compare:

distance(Player.X,Player.Y,Guard.X,Guard.Y)

=

100 (distance from guard in pixels)

Do action.

What am I dong wrong here, it's not printing anything?

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If I'm not totally wrong you compare your variable measure with the distance, you don't set it.

That what look like.

System Every tick -> set measure to distance(Player.X,Player.Y,Guard.X,Guard.Y)
                     set text to "Distance: "& measure
[/code:8hyf1flo]

Sorry to bump on an old tread but I can't seem to get distance to accept anything.

So if I have a var and want to set its value to the distance between to sprites I was thinking:

Every Tick - Set Var = Distance(sprite1.x,sprite2.x) But it doesn't except that syntax or 4 values (sprite1.x,sprite1.y,sprite2.x,sprite2.y)

whats the correct way to write this out? Or has it changed as this thread is very old?

distance(sprite1.x, 0, sprite2.x, 0)