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Learn how to reverse a String in Python.
Formula
There is no built - in function to reverse a String in Python.The fastest (and easiest?) way is to use a slice that steps backwards, -1.
Reverse the string "Hello World": txt = "Hello World"[::-1]
print(txt)We have a string, "Hello World", which we want to reverse: The String to Reverse txt = "Hello World" [::-1]
print(txt)Create a slice that starts at the end of the string, and moves backwards. 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. Slice the String txt = "Hello World" [::-1]
print(txt)
Now we have a string txt that reads "Hello
World" backwards.Print the List txt = "Hello World"[::-1]
print(txt)If you like to have a function where you can send your strings, and return them backwards, you can create a function and insert the code from the example above.def my_function(x):
return x[::-1]
mytxt =
my_function("I wonder how this text looks like backwards")
print(mytxt)Create a function that takes a String as an argument. Create a Function def my_function(x):
return x[::-1]
mytxt =
my_function("I wonder how this text looks like backwards")
print(mytxt)Slice the string starting at the end of the string and move backwards. Slice the String def my_function(x):
return x
[::-1]
mytxt =
my_function("I wonder how this text looks like backwards")
print(mytxt)Return the String def my_function(x):
return x[::-1]
mytxt =
my_function("I wonder how this text looks like backwards")
print(mytxt )Call the function, with a string as a parameter: Call the Function def my_function(x):
return x[::-1]Formula
mytxt = my_function("Iwonder how this text looks like backwards")
print(mytxt)Print the Result def my_function(x):
return x[::-1]Formula
mytxt = my_function("I wonder how this text looks like backwards")print(mytxt)