Merge pull request #932 from TheRenegadeCoder/java-fact

Added Factorial in Java
TheRenegadeCoder · Dec 31, 2018 · 6d412d0 · 6d412d0
2 parents b474a91 + 6bcf0df
commit 6d412d0
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diff --git a/archive/j/java/Factorial.java b/archive/j/java/Factorial.java
@@ -0,0 +1,29 @@
+public class Factorial
+{
+    public static long fact(long n)
+    {
+        if (n <= 0)
+            return 1;
+        return n * fact(n - 1);
+    }
+
+    public static void main(String[] args)
+    {
+        try
+        {
+            long n = Long.parseLong(args[0]);
+            if (n > 59)
+            {
+                System.out.println(String.format("%1$s! is out of the reasonable bounds for calculation.", n));
+                System.exit(1);
+            }
+            long result = fact(n);
+            System.out.println(result);
+        }
+        catch (NumberFormatException e)
+        {
+            System.out.println("Usage: please input a number");
+            System.exit(1);
+        }
+    }
+}
diff --git a/archive/j/java/README.md b/archive/j/java/README.md
@@ -6,10 +6,11 @@ Welcome to Sample Programs in Java!
 
 - [Baklava in Java](https://github.com/TheRenegadeCoder/sample-programs/issues/934)
 - [Hello World in Java](https://therenegadecoder.com/code/hello-world-in-java/)
-- [Reverse a String in Java](https://therenegadecoder.com/code/java/reverse-a-string-in-java/)
+- [Factorial in Java](https://github.com/TheRenegadeCoder/sample-programs/issues/931)
+- [Fibonacci in Java](https://github.com/TheRenegadeCoder/sample-programs/issues/483)
 - [Fizz Buzz in Java](https://github.com/TheRenegadeCoder/sample-programs/issues/400)
 - [Game of Life in Java](https://github.com/jrg94/sample-programs/issues/108)
-- [Fibonacci Sequence](https://github.com/TheRenegadeCoder/sample-programs/issues/483)
+- [Reverse a String in Java](https://therenegadecoder.com/code/java/reverse-a-string-in-java/)
 
 ## Fun Facts