Question

I need to round a float value and convert it into an NSInteger value.

For example:

float f = 90.909088;

I want the result to be 91. How to get rid of this?

Answer 1

One of the following C math functions might work for you:

• double ceil(double)
• double floor(double)
• double nearbyint(double)
• double rint(double)
• double round(double)
• long int lrint(double)
• long int lround(double)
• long long int llrint(double)
• long long int llround(double)
• double trunc(double)

To get more documentation, open a terminal session and type (for example)

man lround

I pick lround as an example because I think that is the one you want.