What is the StrictMath.cbrt method in Java?
The cbrt method is used to find the cube root of a double value. For example, it could find that the cube root of 27 is 3. cbrt is a static method present in the StrictMath class.
Syntax
public static double cbrt(double a)
Argument
This method takes a double value for which the cube root is to be found as an argument.
If the argument is negative, then cbrt(-num) will be computed internally by -cbrt(num).
For NaN , POSITIVE_INFINITY , NEGATTIVE_INFINITY, +0, and -0, the return value is the same as the argument.
Return type
The return type of the cbrt method is double.
Example
The code given below shows us how to use the cbrt method:
class CbrtExample {public static void main( String args[] ) {double num = 27.0;System.out.println( "cbrt(27.0) : " + StrictMath.cbrt(num) );num = -125.0;System.out.println( "cbrt(-125.0) : " + StrictMath.cbrt(num) );num = -0.0;System.out.println( "cbrt(-0.0) : " + StrictMath.cbrt(num) );}}
Explanation
-
Line 3: We create a double
variable,num, with a value of27.0. -
Line 3: We use the
cbrtmethod to get the cube root value of thenum. For the number27.0, the cube root value will be3.0.3*3*3will produce27. -
Lines 6–7: We change the value of the
numto-125.0and call thecbrtmethod to get the cube root of-125.0. The cube root value will be-5.0, because5 * 5 * 5will produce125. The argument is negative, so the-sign is added to the5and-5.0will be returned. -
Lines 9–10: We change the value of the
numto-0.0and call thecbrtmethod to get the cube root of-0.0. The cube root value will be-0.0.
