JavaAlgorithms/Maths/Pow.java

package Maths;

// POWER (exponentials) Examples (a^b)
public class Pow {
  public static void main(String[] args) {
    assert pow(2, 0) == Math.pow(2, 0); // == 1
    assert pow(0, 2) == Math.pow(0, 2); // == 0
    assert pow(2, 10) == Math.pow(2, 10); // == 1024
    assert pow(10, 2) == Math.pow(10, 2); // == 100
  }

  /**
   * Returns the value of the first argument raised to the power of the second argument
   *
   * @param a the base.
   * @param b the exponent.
   * @return the value {@code a}<sup>{@code b}</sup>.
   */
  public static long pow(int a, int b) {
    long result = 1;
    for (int i = 1; i <= b; i++) {
      result *= a;
    }
    return result;
  }
}