ulp()

Example

Find the unit of least precision for different numbers:

System.out.println(Math.ulp(1.0));
System.out.println(Math.ulp(1.0f));
System.out.println(Math.ulp(5000000.0));
System.out.println(Math.ulp(5000000.0f));
System.out.println(Math.ulp(50000000.0));
System.out.println(Math.ulp(50000000.0f));

Definition and Usage

The ulp() method retrieves the unit of least precision of a number.

The unit of least precision signifies the smallest increment that can be made either upwards or downwards from a given number. For instance, for 50000000.0f, the ulp is 4.0, indicating that the next representable number with a float data type above it is 50000004.0f.

Note: The double data type offers greater precision compared to the float data type, resulting in a smaller ulp.

Note: Precision decreases as numbers grow larger, leading to a larger ulp.

Note: The ulp remains unaffected by the sign of a number.

Syntax

public static double ulp(double number)

public static float ulp(float number)

Parameter Values

Technical Details