Round up or down

Question

I have a float which I'd like to round up or down to the nearest integer.

For example:

1.4 = 1.0 1.77 = 2.0 1.1 = 1.0

etc...

I'm doing this in Objective C, so I guess I need a standard math function... Would nearbyintf do it?

Answer 1

You can use any of the standard C library math functions defined in math.h. nearbyintf would work, as would roundf or ceilf or floorf, depending on what you want.

Xcode will show you the documentation (UNIX manual page) for these functions if you option-double-click them in the editor.

Answer 2

use

double a = 2.3;
double b = round(a);

You can find round and other math functions in math.h