How to round off Float values?

The function lroundf() will do it:

float a=20.49;
int myInt = lroundf(a);

In addition to the other answers:

float theFloat = 1.23456;
int rounded = roundf(theFloat); NSLog(@"%d",rounded);
int roundedUp = ceil(theFloat); NSLog(@"%d",roundedUp);
int roundedDown = floor(theFloat); NSLog(@"%d",roundedDown);
// Note: int can be replaced by float

For rounding to specific decimals, see the question mentioned by Alex Kazaev.