how to loop through list index and value python code example

Example 1: how to iterate over a list in python with index

# 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])

Example 2: loop through list, find specific number and output element's index

loop through list, find specific number and output element's index
numbers = [1,5,7,8,2,34,5,23,145,87]
N = 3
if N in numbers:
  print(numbers.index(N))
elif N not in numbers:
  print(-1)