#!/usr/bin/python

jvm_langs = ['Java', 'Jython', 'Groovy', 'Scala', 'Jruby']

#How many JVM langs do you know ?

print ('I know of ' + str(jvm_langs.__len__()) + ' langs that can run on the JVM')

#It's not a good idea to directly us __xxx__ methods

#A better way is. Remember there is usually a top level function which

#is the idoimatic way to access the __xxx__method

print ('I know of ' + str(len(jvm_langs)) + ' langs that can run on the JVM')

print ('Oops I forgot Clojure')

jvm_langs.append('Clojure')

#Let's iterate across the list

for lang in jvm_langs:

print (lang)

#Can we get the 3rd element of the list ?

print ("The 3rd JVM language is " + jvm_langs[2])

#Lists start indexing at the number 0, so the 1st element is [0]

print ("The first 3 JVM languages are " + str(jvm_langs[:3]))

#This goes from the first element until the 3rd and prints them

print ("The 2nd to 4th JVM languages are " + str(jvm_langs[1:4]))

print ("let's sort these languages")

jvm_langs.sort()

print(jvm_langs)