4_list_tuple_set

# lists:

language = ['java', 'js', 'python', 'php', 'ruby']

profession = ['it', 'software-engineer', 'ethical-hacker']

marks = [ 12, 24, 90, 10, 11, 3, 5 ]

print( language )
print('length of list: ' + str( len( language ) ) )  #length
print( language[ :2 ] )  # or language[ 0:2 ] 'java', 'js'
print( language[ 2: ] )    # py, php, ruby
language.append( 'html' )  # add value in list
print( language )
language.insert( 2, 'css' )  # insert in particular index
print( language )
language.extend(profession)  # insert anonther list into language list
print( language )
language.remove( 'php' )  # php is removed
print( language )
language.pop()
print( language )  # last value is removed
language.reverse()  # reverse the list
print( language )
language.sort()    # sorting
print( language )
marks.sort()
print( marks )
marks.sort( reverse = True )  # descending order
print( marks )
print( min(marks) )  # min val
print( sum(marks) )  # finding sum
print( language.index( 'python' ) )  # index no

#loop

print(  'languages & professions: ' )
print('------------------------------')
for index,lan in enumerate( language , start=1 ):
    print( 'index:' + str( index ) + ' ' + lan )


print('\n\n')

## loop

for index, pro in enumerate(profession, start=1):
    if pro == 'ethical-hacker':
        print(pro + ' index number is: ' + str(index))

print('\n\n')
#join

langs_join = '-'.join( language )  # join will covert the list into str with particular punctu
print('join: ' + langs_join )
langs_split = langs_join.split('-')  # covert the str into list
print(langs_split)