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Just run into the problem this week that double comparison often works, but also fails unexpected in an application. This remembers again to use comparison with tolerance for double variables. Like here with abs() and a 0.01 tolerance:
dim d as Double = 10
dim e as Double = 1.19
dim f as Double = d * e
// checking exact fails
if 11.90 = f then
Break
else
Break
end if
// better check with tolerance
if abs(11.90-f) < 0.01 then
Break
else
Break
end if
11 09 14 - 10:34