python enumerate for loop

items=['baseball','basketball','football']
for index, item in enumerate(items):
    print(index, item)

for index, value in enumerate(iterator):
    print(index, value)

my_list = [0,1,2,3,4]
for idx, val in enumerate(my_list):
    print('{0}: {1}'.format(idx,val))
#This will print:
#0: 0
#1: 1
#2: 2
#...

languages = ['Python', 'C', 'C++', 'C#', 'Java']

#Bad way
i = 0 #counter variable
for language in languages:
    print(i, language)
    i+=1

#Good Way
for i, language in enumerate(languages):
    print(i, language)

colors = ["red", "green", "blue", "purple"]

for i in range(len(colors)):
    print(colors[i])

presidents = ["Washington", "Adams", "Jefferson", "Madison", "Monroe", "Adams", "Jackson"]
for num, name in enumerate(presidents, start=1):
    print("President {}: {}".format(num, name))

presidents = ["Washington", "Adams", "Jefferson"]
for num, name in enumerate(presidents, start=0):
    print("President {}: {}".format(num, name))

# Create the list
my_list = [1, 2, 3]

# Python automatically creates an index for you and increments it for you
for index in range(len(my_list)):
  print(my_list[index])

# Python program to illustrate 
# enumerate function in loops 
l1 = ["eat","sleep","repeat"] 
  
# printing the tuples in object directly 
for ele in enumerate(l1): 
    print ele 
print 
# changing index and printing separately 
for count,ele in enumerate(l1,100): 
    print count,ele 
Output:

(0, 'eat')
(1, 'sleep')
(2, 'repeat')

100 eat
101 sleep
102 repe

l1 = ["eat","sleep","repeat"] 
  
# printing the tuples in object directly 
for ele in enumerate(l1): 
    print ele 
print 
# changing index and printing separately 
for count,ele in enumerate(l1,100): 
    print count,ele