Tutorial 11 - Float and Double Primitive Type

As the name implies, floating point numbers are numbers that contain floating decimal points. For example, the numbers 5.5, 0.001, and -2,345.6789 are floating point numbers. Unlike whole numbers, floating point numbers have fractional parts that we express with a decimal point. We need Floating point numbers when we need more precision in calculations.

Precision refers to the format and amount of space occupied by format.

Single Precision(Floating type) occupies 32 bits ( so has width of 32)

Double Precision (Double Type) occupies 64 bits ( so has width of 64)

Range of Float : 1.4E-45 to 3.4028235E38

Range of Double : 4.9E-324 to 1.7976931348623157E308

Program :

package DataType;

public class Main {

public static void main(String[] args) {
float myMinFloatValue = Float.MIN_VALUE;
float myMaxFloatValue = Float.MAX_VALUE;
System.out.println("Float minimum value = " + myMinFloatValue);
System.out.println("Float maximum value = " +myMaxFloatValue);

double myMinDoubleValue = Double.MIN_VALUE;
double myMaxDoubleValue = Double.MAX_VALUE;
System.out.println("Double minimum value = " + myMinDoubleValue);
System.out.println("Double maximum value = " +myMaxDoubleValue);

int myIntValue = 5;
float myFloatValue =5.3f;
double myDoubleValue = 5.9d;
}
}
Output :
Float minimum value = 1.4E-45
Float maximum value = 3.4028235E38
Double minimum value = 4.9E-324
Double maximum value = 1.7976931348623157E308