Floating-point Literals in java

Java Programming Language Variables in java (Article) Variables in java (Program)

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This is a Java program that demonstrates the use of double literals. In Java, a double literal is a number with a decimal point, without any suffix or with the suffix D or d to indicate that it is a double type.

The program declares three double variables named double_value1, double_value2, and double_value3, and assigns them different double literals as values. Specifically:

• double_value1 is assigned the value 89.0D, which represents the decimal value 89.0 as a double type.
• double_value2 is assigned the value 89.0d, which is another way to represent the decimal value 89.0 as a double type.
• double_value3 is assigned the value 89.0, which is a decimal literal that represents the decimal value 89.0 as a double type by default.

The program then prints the values of these variables to the console using the System.out.println method. When run, the program will output the values of double_value1, double_value2, and double_value3, which are all 89.0.

Program:

 //Java literals are fixed or constant values in a program's source code.

public class DoubleLiteral {

  public static void main(String[] a) {

   double double_value1 = 89.0D; //OK
   double double_value2 = 89.0d; //OK
   double double_value3 = 89.0; //OK, by default floating point literal is double
    System.out.println(double_value1);
    System.out.println(double_value2);
    System.out.println(double_value3);

  }
}

/*
Floating-point literals in Java default to double precision.
To specify a float literal, you must append an F or f to the constant.
You can also explicitly specify a double literal by appending a D or d.

float f = 89.0; // Type mismatch: cannot convert from double to float
float ff = 89.0f; //OK

double dou = 89.0D; //OK
double doub = 89.0d; //OK
double doubl = 89.0; //OK, by default floating point literal is double
*/

Output:

89.0
89.0
89.0
Press any key to continue . . .

Explanation:

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