Find power using Math.pow : Math Functions « Development « Java Tutorial

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public class Main {

  public static void main(String[] args) {
    // returns 2 raised to 2, i.e. 4
    System.out.println(Math.pow(2, 2));
    // returns -3 raised to 2, i.e. 9
    System.out.println(Math.pow(-3, 2));
  }
}