[parallax]

OK. I have a text field in which I input a floating point value. Then I have a NSMutableString that I want to format to that number. Now, for some reason, when I input a float like 123.1234 I get 123.123398 (??). How come this happens? Same sort of thing happened when I wrote a string -> float conversion function a while ago.

[ali]

Evils of floating point numbers. The "float" data type is 32 bits, and the way it stores the data means it cannot represent 123.1234 (and many other numbers) exactly. For 123.1234, your choices seem to be 123.1233978271484 or 123.123405456543...

Instead of floatValue, use doubleValue. That will give you better results (64 bits precision).

Ali

[parallax]

Yeah, I just realized that :-)

Thanks.

[davecom]

Hate it when that happens!