C Programming :: Declarations and Initializations - Discussion

Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.

y = (int)(x 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)

Option A is the correct way to typecast a float type value into an integer type. Also, while typecasting it is important to correctly use the parenthesis or else we may get inappropriate output. Option A is most appropriate than the others because first we are computing the expression i.e, x+0.5 and we put it inside a parenthesis, after which we typecast the resulting float value into integer by specifying (int), hence the resulting float type value will be rounded off to the nearest integer.