We will see what is default value of double data type in java in this example . In this tutorial , We will write a java program and declare double variable and then print the value of these variable .We will see also different methods for print double value in java .
Note : The Default value of double in java is 0.0d
Firstly we see how to print double value in java then check default double value in java .
how to Print double Value In Java?
We can print double java using println() and printf() method as below . printf method provides more formatting option as compare println(). Now we check how to print double value in java with example .
public class PrintDoubleValue {
public static void main(String[] args) {
double value = 5.5;
System.out.println("value: " + value);
System.out.printf("value: %f", value);
}
}
Output:
value: 5.5
value: 5.500000
Program to Find the Default value of double In Java
We will check default value of double data type in java in this example. We create a unassigned variable(default double) , then print it’s value using discussed methods above .
public class DefaultDoubleValue {
double defaultDouble;
public static void main(String[] args) {
DefaultDoubleValue defaultDoubleValue = new DefaultDoubleValue();
defaultDoubleValue.printDoubleDefaultValues();
}
public void printDoubleDefaultValues() {
// print default value of double
System.out.println("Default value of double: " + defaultDouble);
System.out.printf("Default value of double : %.1f", defaultDouble);
}
}
Output:
Default value of double: 0.0
Default value of double : 0.0
This examples clears that default double value java is 0.0 .
Let’s be sure about it . We will create few more unassigned double variables and print value of these unassigned double variables .
public class DefaultDoubleValue2 {
double defaultDouble1;
double defaultDouble2;
public static void main(String[] args) {
DefaultDoubleValue2 defaultDoubleValue2 = new DefaultDoubleValue2();
defaultDoubleValue2.printDoubleDefaultValues();
}
public void printDoubleDefaultValues() {
// print default value of double
System.out.println("Default value of double 1: " + defaultDouble1);
System.out.printf("Default value of double 1 : %.1f", defaultDouble1);
System.out.println("");
System.out.println("Default value of double 2: " + defaultDouble2);
System.out.printf("Default value of double 2 : %.1f", defaultDouble2);
}
}
Output :
Default value of double 1: 0.0
Default value of double 1 : 0.0
Default value of double 2: 0.0
Default value of double 2 : 0.0
Now it is verify that default double value java is 0.0 .
In this tutorial we learned what is default double value java . We have seen also different method how to print double value in java . You can see more java program for practice .