Calculate with negative prefix

[matt_xtr]

Hi,

I'm seeing code like this.

<cfset variables.AltTotalPrice = -(-Val(Order.TotalPrice) - Val(variables.TotalAltAmountRemaining))>

What does "(-Val(Order.TotalPrice)" do?

I created a simple test and it seems it is just returning negative values.

Can someone shed light why does a previous developer doing this?

Thanks.

[matt_xtr]

this one adds up totalprice and totalaltamountremaining that it doesn't seem to subtract base on the cfset below.

<cfset TotalPrice = 90 />
<cfset TotalAltAmountRemaining = 80 />

<cfset t = TotalPrice - -Val(TotalAltAmountRemaining)>
<cfdump var="#t#">

strange formula that I can't answer why this adds up. any idea?

[Cole]

matt_xtr,

it is simple math really. think of :

TotalPrice - -Val(TotalAltAmountRemaining)

as :

90 - (-80)

I can't really speak to why the developer wrote it that way.