answersLogoWhite

0

There are five common methods of string inversion in Python: using string slicing, using recursion, using the list reverse () method, using stack and using for loop.

  1. Use string slicing (most concise)

s = "hello"

reversed_ s = s[::-1]

print(reversed_s)

>>> olleh

  1. Use recursive def reverse_ it(string):

if len(string)==0:

return string

else:

return reverse_ it(string[1:]) + string[0]

print "added " + string[0]

string1 = "the crazy programmer"

string2 = reverse_ it(string1)

print "original = " + string1

print "reversed = " + string2

  1. Use the list reverse() method in [25]: l = ['a', 'B', 'C','d ']

...: l.reverse()

...: print (l)

['d', 'c', 'b', 'a']

  1. Using stack def Rev_ string(a_string):

L = list (a_string) # simulate all stacking

new_ string = ""

while len(l)>0:

new_ String + = l.pop() # simulate stack out

return new_ string

  1. Use the for loop #for loop

def func(s):

r = ""

max_ index = len(s) - 1

for index,value in enumerate(s):

r += s[max_index-index]

return r

r = func(s)

The above are the five common methods of string inversion in Python. I hope it can be helpful to your learning of Python strings

User Avatar

George Durand

Lvl 3
3y ago

What else can I help you with?

Related Questions

How to write a program in python to print the reverse of a number?

In python, type the following into a document. NOTE: Sentences following a # symbol are comments, and are not necessary for the program to run. #!/usr/bin/python #This program takes a input from a user and reverses it. number = input("Type a number: ") #This takes input from a user. a = len(number) #This finds the length of the number reverse = "" #This sets the variable reverse to an empty string. for i in number: a = a-1 #The places in a string start from 0. The last value will be the length minus 1.reverse = reverse + number[a] #Makes the number's last digit the new string's first. print("The reverse of", number, "is", reverse + ".") #prints the resulting string. This program will take any sequence of characters and reverse them. The final value is a string, but if an integer is needed, one needs only to add the line reverse = int(reverse) above the print statement. However, this will stop the program from being able to reverse strings, as it is not possible to convert a string to an integer if it is not a number.


How do you enter integer in python?

In Python, you can enter an integer using the input() function, which captures user input as a string. To convert this string to an integer, you can use the int() function. For example: user_input = input("Enter an integer: ") integer_value = int(user_input) This will convert the input string to an integer, assuming the user enters a valid integer.


How do you get input from the user in python?

In Python, you can get input from the user using the built-in input() function. This function prompts the user for input and returns it as a string. For example, you can use user_input = input("Enter something: ") to display a message and capture the user's response. If you need the input in a different data type, you can convert it using functions like int() or float().


2 Create a Console application that gets the a number as input from the user and it should be reversed?

//This function reverse any given string, except nullstatic string Reverse(string s) {char[] temp = s.ToCharArray();Array.Reverse(temp);return new string(temp);}//The main usagestring inputString = Console.ReadLine();Console.WriteLine(Reverse(inputString));


How do I convert a string to an integer in python?

1.>>> x=input("enter data: ")2.enter data: 253.>>> type(x)4.5.>>> y = int(x)6.>>> type(y)7.I used Python 3.0 for this.Else for earlier version, to accept string type input, u should be using "raw_input" instead of "input" only.I made python accept a data and tested its type, which return to be a string (line 4).Then I usedint()to convert the string into a number, which, for testing purpose, I assigned the value to a variable y. (line 5)Testing the type of data that variable y stores, confirms that the string type was converted to an integer type.(line 7)


Using Python write an algorithm that takes a string as input and determines whether or not it is a palindrome?

def isPalindrome(s): return s == s[::-1] then just call the function with a string like isPalindrome('poop')


How input and output is achived in python programming?

in python 3 basic input and output are achieved withstring = input("prompt>")andprint("something")In python 2 you havestring = raw_input("prompt>")andprint "something"


Write a program that converts a string from small letters to capital letters and vice versa?

Here's a Python program that accomplishes this: def convert_case(input_str): return input_str.swapcase() user_input = input("Enter a string: ") converted_str = convert_case(user_input) print("Converted string:", converted_str)


A program of reverse a number using recursion in C?

(in C#)string Reverse (string input) {There are two cases; the recursive case and the trivial case.The trivial case is when the string has zero or one character. In this case, the reversal of the string is the same.if (input.Length


What is the C programming code to reverse a input string?

{ // get input char input[256]; gets(input); // reverse it char reverse[256]; strReverse(input, reverse); } // reverses str and puts the result in buff // NOTE: buff must be at least as large as str void strReverse(const char* str, char* buff) { const int length = strlen(str); // special case for zero-length strings if( length == 0 ) { return; } // reversify int i; for(i = 0; i < length; ++i) { buff[i] = str[length - i - 1]; } buff[i] = '\0'; }


A program of c plus plus to accept the string and display the alternate characters in reverse order using pointer?

The following program prints every second character of the input in reverse order. #include<iostream> #include<sstream> int main() { std::cout << "Input:\t"; std::string input = ""; std::getline (std::cin, input); if (input.size()) { std::cout << "Output:\t"; unsigned index = input.size() / 2 * 2; do { index -= 2; std::cout << input[index]; } while (index); std::cout << std::endl; } }


How can I remove hex characters from a string in Python?

To remove hex characters from a string in Python, you can use the regular expression module re and the sub function. Here is an example code snippet: python import re def removehex(inputstring): return re.sub(r'x00-x7F', '', inputstring) inputstring "Hellox00World" outputstring removehex(inputstring) print(outputstring) This code snippet defines a function removehex that uses a regular expression to remove any non-ASCII characters (hex characters) from the input string.