Answers for "python loop from end to begin"

2

python loop back to start

def main(): #defines the area in indents that will be triggered with main()#
  print('hi')
  yn = input('Wanna loop back to the start? ')
  if yn = 'yes':
    main() #loops back to where we defined main#
    
main() #This starts the main loop, without this, main would just be defined but not run#
Posted by: Guest on August-09-2020
7

python for loop start, end

my_list = [1, 2, 3]
my_list.reverse()           # my_list is modified
print(my_list)              # '[3, 2, 1]'
my_revert = my_list[::-1]   # my_list stays [3, 2, 1]
print(my_revert)            # '[1, 2, 3]'
# Item by item reverse with range(<start>, <end>, <step>)
for i in range(len(my_list), 0, -1):		# my_list is [3, 2, 1]
    print(my_list[i-1])		# '1' '2' '3'
for i in reversed(range(len(my_list))):
    print(my_list[i])       # '1' '2' '3'
Posted by: Guest on May-15-2021

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