reverse a str pyhton

'String'[::-1] #-> 'gnirtS'

'hello world'[::-1]
'dlrow olleh'
In this particular example, the slice statement [::-1] means 
start at the end of the string and end at position 0, 
move with the step -1, negative one, which means one 
step backwards.
#From w3schools.com

'hello world'[::-1]
'dlrow olleh'

  txt =  "Hello World" [::-1]

  print(txt) 

'hello world'[::-1]
#  'dlrow olleh'

# in order to make a string reversed in python 
# you have to use the slicing as following

string = "racecar"
print(string[::-1])

'your sting'[::-1]

str1="Hello"
#if u want to take length input from user then use the next line 
#n=int(input("enter the no of elements: ")) #this one 

#if u don't wanna ask user the length then directly use this next line
n=len(str1)

for i in range(-1,-(n+1),-1):
        print(str1[i],end='')
#prints olleh    

  txt = "Hello World"[::-1]
print(txt) 

belief = "the world is mine, hello"[::-1]
print(belief)