Convert distance to Percent with two decimal numbers [Solved]

[besix]

Hey
I have a simple script that converts the distance to a percentage but gives a percentage with a large decimal number. how to make only two decimal numbers

Code: Select all

local pct_sensor = 'Opał'
local depth_sensor = 'Dystans'
local tank_height = 100

return {
        on = {
                devices = {depth_sensor}
        },
        execute = function(dz, device)
		local depthdev = dz.devices(depth_sensor)
		local pctdev = dz.devices(pct_sensor)
		local depth = depthdev.state
		
		-- Calculate percentage 
		local pct = (tank_height - depth) / tank_height * 100 
		dz.log('Tank update to ' .. pct.. '% ' , dz.LOG_INFO)
		pctdev.updatePercentage(pct)
	
end
}
		 

I get 40.349456%
I want 40.35%
Who will help ?

[waaren]

I have a simple script that converts the distance to a percentage but gives a percentage with a large decimal number. how to make only two decimal numbers

I get 40.349456%
I want 40.35%

Changing line

Code: Select all

		local pct = (tank_height - depth) / tank_height * 100 

to

Code: Select all

               local pct = dz.utils.round((tank_height - depth) / tank_height * 100 ,2)

should do it.

[besix]

It works now, Thank you very much! Waaren