How can I increase number in input statement in python?

How can I increase number in input statement in python?

#     The most easist way imade it my self : */
  
#   imports: 
import itertools

# the loop you can also copy this 
while True:
    for i in itertools.count(start=1):
      
        add = ">>>"

        main = i * 1

        input(str(main) + " " + add)
        
        
# Thank You