Operations on Strings in Python

Understanding Operations on Strings

String operations involve various manipulations such as concatenation, reversal, and comparison.

We will explore three different methods to perform operations on strings in Python.

Method 1: Using Standard Library Functions

This method uses built-in string functions for operations.

# Python program for string operations
str1 = "Hello"
str2 = " World"
str1 += str2
print("Concatenated String:", str1)
print("Length of String:", len(str1))
            

Method 2: Using Character Array Manipulation

This method manually processes each character for operations.

# Python program to reverse a string
str1 = "Hello"
char_list = list(str1)
left, right = 0, len(char_list) - 1
while left < right:
    char_list[left], char_list[right] = char_list[right], char_list[left]
    left += 1
    right -= 1
print("Reversed String:", "".join(char_list))
            

Method 3: Using Pointer Manipulation (Character Comparison)

This method performs operations using character comparison.

# Python program to compare two strings
str1 = "Hello"
str2 = "Hello"
if str1 == str2:
    print("Strings are equal")
else:
    print("Strings are not equal")