วิธีการย้อนกลับสตริงใน Python (5 วิธี)

# function for reversing a string
def reverse_string(string):
    # an empty string for storing reversed string
    reversed_string = ""
    # looping through the string
    for char in string:
        # reversing the string
        reversed_string = char + reversed_string
    # returning a reversed string
    return reversed_string

# the string to reverse
string = "Guru99"
# printing a message
print(f"String Reversal using a for loop")
# printing the original string
print(f"Original String: {string}")
# making a functional call inside a print function using an f-string
print(f"Reversed String: {reverse_string(string)}")

String Reversal using a for loop
Original String: Guru99
Reversed String: 99uruG

# declaring a string to reverse
string = "Python"
# initializing an empty string to store the reversed string
reversed_string = ""
# printing a message
print(f"String Reversal using a while loop")
# printing the original string
print(f"Original String: {string}")
# find length of a string and store in count variable
count = len(string)
# a while loop for looping through the string characters
while count > 0:
    # save the value of str[count-1] in reversed_string
    reversed_string += string[count - 1]
    # decrementing index
    count = count - 1
print(f"Reversed String: {reversed_string}")

String Reversal using a while loop
Original String: Python
Reversed String: nohtyP

# function to reverse a string
def reverse(string):
    # the  slice syntax
    reversed_string = string[::-1]
    return reversed_string

# declaring a string to reverse
string = "Let's guru99"
# printing a message
print(f"String Reversal using Slicer Operator")
# printing the original string
print(f"Original String: {string}")
# making a functional call inside a print function using an f-string
print(f"Reversed String: {reverse(string)}")

String Reversal using Slicer Operator
Original String: Let's guru99
Reversed String: 99urug s'teL

# function to reverse a string
def reverse(string):
    # reversed() function inside the join() function
    string = "".join(reversed(string))
    # returning the reversed string
    return string

# declaring a string to reverse
string = "guru99"
# printing a message
print(f"String Reversal using reversed() function")
# printing the original string
print(f"Original String: {string}")
# making a functional call inside a print function using an f-string
print(f"Reversed String: {reverse(string)}")

String Reversal using reversed() function
Original String: guru99
Reversed String: 99urug

# a function to reverse a string
def reverse(string):
    # Checking the length of string
    if len(string) == 0:
        return string
    # reversing string if len(string) != 0
    else:
        # recursively calling the reverse() function
        return reverse(string[1:]) + string[0]

# declaring a string to reverse
string = "I love guru99"
# printing a message
print(f"String Reversal using Recursion")
# printing the original string
print(f"Original String: {string}")
# making a functional call inside a print function using an f-string
print(f"Reversed String: {reverse(string)}")

String Reversal using Recursion
Original String: I love guru99
Reversed String: 99urug evol I