double keyword in java

In Java, double ” is a primitive type.

A double variable stores a double−precision 64-bit floating point value.


double ratio = .01;

double diameter = 6.15;

double height = 1.35E03; // 1.35 * 103 or 1350.0

double height = 1e−2; // 1.0 * 10−2 or 0.01

The double keyword can be used as a method parameter as below:

  1. public void displayMarks(double marks) {
  3.     System.out.println("Total percentage marks "+marks);
  4. }
public void displayMarks(double marks) {

    System.out.println("Total percentage marks "+marks);

The double keyword can be used as a return type of a method as well:

  1. public double getMarks() {
  3.                 return 94.5;
  4. }
public double getMarks() {
                return 94.5;

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