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Let’s try this :
float test = 3.56;
float roundedVal = round(test * 10.0f) / 10.0f;
NSLog (@"%f", roundedVal);
Why does tthe NSLog shows 3.600000, and the debugger 3.5999999 ?
What is the correct value I can count on ?
A
floatis not very precise and you can’t expect them to be displayed accurately from one “view” to the next depending on a variety of factors. Read What Every Computer Scientist Should Know About Floating-Point Arithmetic.Boils down to this: use
doubleif you really want precision.