From ec1090d7a8758cb3759ba903b946594257e309f7 Mon Sep 17 00:00:00 2001
From: Muhammad Usama <lifeh2o@gmail.com>
Date: Fri, 30 Aug 2019 19:58:06 +0500
Subject: Optional parameters in methods

---
 groovy.html.markdown | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'groovy.html.markdown')

diff --git a/groovy.html.markdown b/groovy.html.markdown
index efbb2b32..89ca973a 100644
--- a/groovy.html.markdown
+++ b/groovy.html.markdown
@@ -180,6 +180,21 @@ class Foo {
     def lastName
 }
 
+/*
+  Methods with optional parameters
+*/
+
+// A mthod can have default values for parameters
+def say(msg = 'Hello', name = 'world') {
+    "$msg $name!"
+}
+
+// It can be called in 3 different ways
+assert 'Hello world!' == say()
+// Right most parameter with default value is eliminated first.
+assert 'Hi world!' == say('Hi')
+assert 'learn groovy' == say('learn', 'groovy')
+
 /*
   Logical Branching and Looping
 */
-- 
cgit v1.2.3