Change project structure to a Maven Java project + Refactor (#2816)

src/main/java/com/thealgorithms/maths/Pow.java

@@ -0,0 +1,28 @@
+package com.thealgorithms.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;
+    }
+}