// Illustrate Java numeric datatypes.

public class Datatypes
{
    public static void main(String[] args)
    {
        // Range of a byte variable is 0 to 255.
        // Size of a byte variable is 1 byte.
        byte a = (byte) 127;

        // Range of a short variable is -32768 to 32767.
        // Size of a short variable is 2 bytes.
        short b = (short) 20000;

        // Range of an int variable is -2 billion to
        // 2 billion.  Size is 4 bytes.
        int c = 1500000000;

        // Range of a long variable is -9 quintillion
        // to 9 quintillion.  Size is 8 bytes.
        // Use L suffix to denote a long constant.
        long d = 6000000000L;

        // Display variables defined so far.
        System.out.println("a = " + a + " b = " + b +
                          " c = " + c + " d = " + d);
        System.out.printf("a = %d b = %d c = %d d = %d\n",
                           a, b, c, d);

        // Range of a float variable is between
        // -3.4*10^38 to 3.4*10^38.  A float
        // variable has about 7 significant digits.
        // Use F suffix to denote a float constant.
        float f = 3.14159265358979323F;

        // Range of a double variable is between
        // -1.8*10^308 to 1.8*10^308.  A double 
        // variable has about 15 significant digits.
        double g = 3.14159265358979323;

        // Print remaining output.
        System.out.println("f = " + f + " g = " + g);
        System.out.printf("f = %f g = %f\n", f, g);
    }
}

// Output:
a = 127 b=20000 c = 150000000000 d = 6000000000
a = 127 b=20000 c = 150000000000 d = 6000000000
f = 3.1415927 g = 3.141592653589793
f = 3.141593 g = 3.141593