How to import math lib in java

import static java.lang.Math.sqrt;
public class Demo {
   public static void main(String[] arg) {
      double num = 36.0;
      System.out.println("The number is: " + num);
      System.out.println("The square root of the above number is: " + sqrt(num));
   }
}

Source: tutorialspoint.com

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