[Coco] Simple value inersion in Color Basic

[William Astle]

That works for negative and mixed sign numbers too, in case anyone is 
wondering. For the 1 and -1 case, the sum is 0 so you have "A = 0 - A". 
For -1 and -129, you have "A = -130 - A". (-130--1 = -129, -130--129 = -1).

There is a trivial proof of this concept that I leave as an exercise for 
the bored.

On 15-01-20 01:19 PM, Juan Castro wrote:
> If the values are not symmetrical like 1 and -1, all you have to do is use
> their sum and subtract from the variable. Let's say you want to toggle
> between 129 and 1:
>
> A=130-A
>
>
> Juan Castro
> Enviado do meu Olivetti Programma 101
>
> On Tue, Jan 20, 2015 at 6:08 PM, Nick Marentes <nickma2 at optusnet.com.au>
> wrote:
>
>> Can anyone tell me a really simple way to "invert" the value in a variable
>> between 2 numbers?
>>
>> Let's say the variable is in A and I want to toggle the value between 1
>> and -1.
>>
>> Color Basic lacks many of the commands I'm use to but there must be an
>> easy "mathematical" way to do this.
>>
>> Nick
>>
>>
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>