Added code example

Jan21/rubyexamples/helloworld.rb

@@ -0,0 +1,62 @@
+# lets create an array of courses
+puts ("printing courses")
+courses = ["AWS", "AZURE", "DevOps"]
+puts(courses)
+
+
+puts("printing topics of #{courses[2]}")
+devops_topics = %w(ansible chef git jenkins azuredevops sonarqube terraform docker kubernetes)
+#puts(devops_topics)
+
+# simple for loop
+devops_topics.each do |topic|
+    puts("Topic ==>  #{topic}")
+end
+
+# hash
+topic_hash = {
+    'AWS' => ["S3", "EC2", "VPC"],
+    'Azure' => {
+        "Storage" => "Azure Storage Accounts",
+        "Network" => "Azure VNET",
+        "Compute" => "Azure VM"
+    }
+}
+puts("topics of aws are #{topic_hash['AWS']}")
+topic_hash['AWS'].each do |aws_topic|
+    puts("Topic is #{aws_topic}")
+end
+
+puts(topic_hash['Azure']['Storage'])
+topic_hash['Azure'].each do |topic_name, topic_value|
+    puts("#{topic_name} ==> #{topic_value} ")
+end
+
+name = "Azure1"
+
+if name == 'Azure'
+    puts("This is azure")  
+end
+
+if name == "Azure"
+    puts("Azure")
+
+elsif name == "AWS"
+    puts("AWS")
+else
+    puts("DevOps")
+
+end
+
+case name
+when 'Azure'
+    puts("Azure") 
+when 'AWS'
+    puts("AWS")
+
+else
+    puts("DevOps")
+
+end
+
+