How do I convert a positive number to negative?

Question

How do I convert a positive Integer to a negative with Delphi? I know you could use ABS(int) to convert a negative to a positive, but I need it to convert positive to negative.

Answer 1

from what I know there is no function for that. you can make

if yourvariable > 0 then
    yourvariable := -yourvariable;

Answer 2

If you want to be absolutely sure to get a negative result (or zero), use

number := -abs(number)

Answer 3

Ehhh... Too late but number := number * -1; would work too, but this change the symbol of any number, negative to positive and backwards... To ensure a negative value go with @Mef Answer

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EDIT: even later, but number := 0 - number; would work too... This just reverses the symbol as well

Answer 4

Let n be your number and the formula for n-(n*2) = -n

Answer 5

Simple this is how I think it can be solved.. in python though

>>>num = -234
-234
>>>num *= -1
234
>>>num
234

Correct me if am wrong