Java Java API
Class:
java.lang.Math
Methods:
public static double scalb(double d,
int scaleFactor)
Returns d x 2scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the double value set.
public static float scalb(float f,
int scaleFactor)
Returns f x 2scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the float value set.
Examples
 package com.logicbig.example.math;
public class ScalbExample {
public static void main(String... args) {
findScalb(35.97, 3);
findScalb(71.14, 2);
findScalb(-99.53, 5);
findScalb(-0.14, 4);
}
private static void findScalb(double d, int scaleFactor) {
double result = Math.scalb(d, scaleFactor);
System.out.printf("Math.scalb(%s,%s) = %s%n", d, scaleFactor, result);
}
}
OutputMath.scalb(35.97,3) = 287.76
Math.scalb(71.14,2) = 284.56
Math.scalb(-99.53,5) = -3184.96
Math.scalb(-0.14,4) = -2.24
package com.logicbig.example.math;
public class ScalbExample2 {
public static void main(String... args) {
findScalb(23.15f, 7);
findScalb(99.25f, 5);
findScalb(-78.12f, 3);
findScalb(0.0f, 2);
findScalb(-0f / 0, 11);
}
private static void findScalb(float d, int scaleFactor) {
float result = Math.scalb(d, scaleFactor);
System.out.printf("Math.scalb(%s,%s) = %s%n", d, scaleFactor, result);
}
}
OutputMath.scalb(23.15,7) = 2963.2
Math.scalb(99.25,5) = 3176.0
Math.scalb(-78.12,3) = -624.96
Math.scalb(0.0,2) = 0.0
Math.scalb(NaN,11) = NaN
|
|
