Negative Function

omik_1

how do I negate an number?

I am memo I put [NOT(4)] and the result is -5
I was especting to get -4

Please comment.

Best regards

-=Den=-

NOT is a boolean operation.

signed integer -2 147 483 648...+2 147 483 647

in hex (negative) 0XFFFFFFFF80000000 (-2 147 483 648) ... 0XFFFFFFFFFFFFFFFF( -1)
positive 0X0000000000000000(0) .... 0X0000000080000000(+2 147 483 647)

for example you have 4 (0X0000000000000004), not (4) inverts all bits and you get 0XFFFFFFFFFFFFFFFB (-5).

in binary:
0000000000000000000000000000000000000000000000000000000000000100(4)
inverted
1111111111111111111111111111111111111111111111111111111111111011(-5)

I don't know why you especting to get -4

omik_1

OK Den thanks for the information, I am learning every day.

What is the simplest way to get the negative of a positive number or the positive of a negative number?

eg. 4 to -4 or -4 to 4

I am currently using this formual (-1)X mutiplyling the number by -1

(-1)4 = -4 and
(-1)-4 = 4

Regards

-=Den=-

wrote:

I am currently using this formual (-1)X mutiplyling the number by -1

Now you use correct method

omik_1

All these years have past. I remember when i just started using Fast Reports