Creating a two decimal number from a float - not for display

I having been using floating number types in some calculations. I use NSLog to view the values in the console and they are appearing in scientific notation. I want the values to be represented by two decimal places for the calculations...not开发者_开发百科 the display. How do I conver to two decimals?

If you're attempting to perform fixed-point arithmetic, then use int or long int data types to represent hundredths, and when you want to display the values, divide by 100.0f. Also look at using NSNumberFormatter.

I don't know the language, but one can usually do this using something like

int(n * 100 + 0.5) / 100

Be sure to check the available libraries for a function named round or similar. In Perl, I would just use

sprintf("%.2f", $n)

This does rounding and the result can be used as a number.