Positive and negative values in fields

Question

I want to make if field1 is a negative integer then field 2 will be the same integer but positive. but if field1 is any positive then field2 will be always 0.0

Example:

if
 field1 = -180:
     field2 = 180
if field1 = 180
    field2 = 0.0

Answer 1

You can check if a number is negative by comparing it to zero.

if field1 < 0:
    field2 = -field1
else:
    field2 = 0.0

Or more succinctly:

field2 = (-field1 if field1 < 0 else 0.0)

Answer 2

try this:

if field1 < 0:
    field2 = abs(field1)
else:
    field2 = 0.0