Based on Progr 2.4, I tried using float numbers.

float sum;

sum = 50.5 + 25.12;

NSLog(@"The sum of 50.5 and 25.12 is %f",sum);

But Xcode says the answer is:

The sum of 50.5 and 25.12 is 75.620003

What gives?

Where did the 0.000003 extra value came from?