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Maths/Factorial.java

@@ -2,26 +2,27 @@ package Maths;
 
 public class Factorial {
 
-    /* Driver Code */
-    public static void main(String[] args) {
-        assert factorial(0) == 1;
-        assert factorial(1) == 1;
-        assert factorial(5) == 120;
-        assert factorial(10) == 3628800;
-    }
+  /* Driver Code */
+  public static void main(String[] args) {
+    assert factorial(0) == 1;
+    assert factorial(1) == 1;
+    assert factorial(5) == 120;
+    assert factorial(10) == 3628800;
+  }
 
-    /**
-     * Calculate factorial N using iteration
-     *
-     * @param n the number
-     * @return the factorial of {@code n}
-     */
-    public static long factorial(int n) {
-        if (n < 0) {
-            throw new IllegalArgumentException("number is negative");
-        }
-        long factorial = 1;
-        for (int i = 1; i <= n; factorial *= i, ++i) ;
-        return factorial;
+  /**
+   * Calculate factorial N using iteration
+   *
+   * @param n the number
+   * @return the factorial of {@code n}
+   */
+  public static long factorial(int n) {
+    if (n < 0) {
+      throw new IllegalArgumentException("number is negative");
     }
+    long factorial = 1;
+    for (int i = 1; i <= n; factorial *= i, ++i)
+      ;
+    return factorial;
+  }
 }