python iterate backwards through list
>>> a = ["foo", "bar", "baz"]
>>> for i in reversed(a):
... print(i)
...
or
>>> for i, e in reversed(list(enumerate(a))):
... print(i, e)python iterate backwards through list
>>> a = ["foo", "bar", "baz"]
>>> for i in reversed(a):
... print(i)
...
or
>>> for i, e in reversed(list(enumerate(a))):
... print(i, e)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#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'Copyright © 2021 Codeinu
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