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

public class Main {

    public static void main(String[] args) {
        float  a=12.6664287277627762f;
        double b=12.6664287277627762;

        System.out.println(a);
        System.out.println(b);
    }
}

Output:

12.666429
12.666428727762776

float can handle about 7 decimal places. A double can handle about 16 decimal places.