package class2_2_OfficeHours_start;// Dr. Yoder. MSOE. 15 March 2017

import com.sun.org.apache.bcel.internal.generic.FLOAD;

public class AssigningDoubleToFloat {
    /** This program is to answer the question:
     * Why do we write the f after the 1.0 in 1.0f
     * (e.g. in the first line of program below
     * or on the practice half exam 1)?
     * Why not simply write float f = 1.0? Isn't 1.0
     * a number with a decimal part anyway?
     *
     * The key to this question is that the float type
     * uses only 32 bits and the double type uses 64 bits.
     * So the float can only store about seven digits after
     * the decimal point while the double can store about 16.
     *
     * In this example, even though I put 11 digits of PI
     * in the floating-point constant, only about seven
     * are actually stored as you can see when I copy
     * them back into the double.
     *
     * The real value of pi continues         ...265359
     * but our value from the float continues ...274101
     * So there really aren't any correct digits after
     * that last 26 (or 27 if you round).
     * @param args ignored.
     */
    public static void main(String[] args) {
        float f = 1.0f;
        float pi = 3.14159265359f;
        System.out.println("           pi = " + pi);
        System.out.println("  (double) pi = " + (double) pi);
        System.out.println("3.14159265359 = " + 3.14159265359);
    }
}