loop through list, find specific number and output element's index code example

Example: 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)