different values for float and double

Question

I don\'t understand why are float values different from double values. From the example bellow it appears that float provides different result than double for the same opera

Answer 1

Floats have less precision than doubles.

It's roughly half as much - 23 bits vs 52 for double(Thanks a lot Mr. Skeet!)!

32-bit for floats, 64-bit for doubles. ...Remember that the word "float" has fewer letters than "double", that's a "memory" trick :)