Tutorial Gateway

Java copySign Function

by

The Java copySign Function is one of the Java Math Library function which is used to find the absolute value of first argument and return the absolute value along with sign specified in second argument.

Java copySign Function syntax

The basic syntax of the Math.copySign Function in Java Programming language is as shown below:

Math.copySign(data_type magnitude, data_type sign);
  • magnitude: Please specify the magnitude value here. Math.copySign Function will find the absolute value of this argument. If you find difficult to understand the absolute values then, please refer Java abs Method article.
  • sign: Please specify the Sign value here. Math.copySign Function will use this arguments sign (Positive or Negative) and returns the output.

For example, if magnitude = 10.45 and sign = – 5.40 then, Math.copySign(10.45, -5.40) = -10.45. This is because absolute value of 10.45 is 10.45 and the second argument sign is Negative so, output is -10.45

Java Programming provides two different Math.copySign Java functions to find the Maximum or Largest value from the given two arguments.

The following Java copySign function will accept positive or negative double value as first and second argument and returns the first floating value along with sign specified in second argument

static double copySign(double magnitude,  double sign); //Return Type is double

// In order to use in program: 
Math.copySign(double magnitude,  double sign);

Following function will accept positive or negative float value as first and second argument and returns the first floating value along with sign specified in second argument

static float copySign(float magnitude,  float sign); //Return Type is float

// In order to use in program: 
Math.copySign(float magnitude,  float sign);

Java copySign Function Example

The Java Math.copySign function is used to return the absolute value of first argument along with sign specified in second argument. In this example, We are going to find the same of different data types and display the output

// Java Math.copySign Function
package MathFunctions;

public class CopySign {
	public static void main(String[] args) {
		double b = 10.9666, c = 14.6674, d = -9.474, e = -14.9865;
		float g = 1.23f, h = 4.809f, i = -7.89f, j = -6.54f;
		
		System.out.println("CopySign result of Positive Values: " + Math.copySign(10, 20));
		System.out.println("CopySign result of Negative Values: " + Math.copySign(-10, -20));
		System.out.println("CopySign result of both Positive & Negative Values: " + Math.copySign(10, -20));
		System.out.println("CopySign result of both Positive & Negative Values: " + Math.copySign(-5, 10));
		
		System.out.println("\nCopySign result of Positive Doubles: " + Math.copySign(b, c));
		System.out.println("CopySign result of Negative Double Values: " + Math.copySign(d, e));
		System.out.println("CopySign result of both Positive & Negative Double Values: " + Math.copySign(c, d));
		System.out.println("CopySign result of both Positive & Negative Double Values: " + Math.copySign(e, b));
		
		System.out.println("\nCopySign result of Positive Float Values: " + Math.copySign(g, h));
		System.out.println("CopySign result of Negative Float Values: " + Math.copySign(i, j));
		System.out.println("CopySign result of both Positive & Negative Float Values: " + Math.copySign(h, i));
		System.out.println("CopySign result of both Positive & Negative Float Values: " + Math.copySign(j, h));
	}
}

OUTPUT

Java copySign Function 1

ANALYSIS

In this Java copySign example, First, We declared variables of type Double and Float to display the functionality of java Math.copySign function on different data types.

double b = 10.9666, c = 14.6674, d = -9.474, e = -14.9865;
float g = 1.23f, h = 4.809f, i = -7.89f, j = -6.54f;

Next, We used the Java Math.copySign Function directly on both the Positive and negative values.

System.out.println("CopySign result of Positive Values: " + Math.copySign(10, 20));
System.out.println("CopySign result of Negative Values: " + Math.copySign(-10, -20));
System.out.println("CopySign result of both Positive & Negative Values: " + Math.copySign(10, -20));
System.out.println("CopySign result of both Positive & Negative Values: " + Math.copySign(-5, 10));

Next, We used the Java Math.copySign Function on variable b, c, d and e (they belongs to double type). Following statements will call the copySign method of double type ( static double copySign(double magnitude, double sign) ) to display the result.

System.out.println("\nCopySign result of Positive Doubles: " + Math.copySign(b, c));
System.out.println("CopySign result of Negative Double Values: " + Math.copySign(d, e));
System.out.println("CopySign result of both Positive & Negative Double Values: " + Math.copySign(c, d));
System.out.println("CopySign result of both Positive & Negative Double Values: " + Math.copySign(e, b));

Next, We used the Math.copySign Function on variable g, h, i and j (they belongs to float type). Following statements will call the copySign method of float type ( static float copySign(float magnitude, float sign) ) to display the result.

System.out.println("\nCopySign result of Positive Float Values: " + Math.copySign(g, h));
System.out.println("CopySign result of Negative Float Values: " + Math.copySign(i, j));
System.out.println("CopySign result of both Positive & Negative Float Values: " + Math.copySign(h, i));
System.out.println("CopySign result of both Positive & Negative Float Values: " + Math.copySign(j, h));