reverse string in python
'hello world'[::-1]
'dlrow olleh'reverse for loop python
# 1.
for i in reversed(range(3)): # output: 0
print(i) # 1
# 2
# works with arrays as well , reversed(arr)
# 2.
# another alternative is
arr = [1,2,3]
# note: arr[start : end : step]
for i in arr[::-1]: # output: 0
print(i) # 1
# 2
# 3.
# last alternative i don't recommened!
# note: range(start, end, step)
for i in range(len(arr) - 1, -1 , -1): # output: 0
print(i) # 1
# 2
# read more on range() to understand even better how it works has the same rules as the arraysprint string in reverse order uing for loop python
# reversing a sring using recursion
def reverse_recursion(s):
if len(s) == 0:
return s
else:
return reverse_recursion(s[1:]) + s[0]Copyright © 2021 Codeinu
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