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String Slicing and Operations on String in Python


 

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String slicing and operations in Python are fundamental concepts that allow for manipulation and access to substrings and various transformations.

String Slicing

String slicing allows you to extract parts of a string. The general form is:

substring = string[start:stop:step]

start: The starting index of the slice (inclusive).

stop: The ending index of the slice (exclusive).

step: The step size or interval between indices.


1. Basic Slicing:

s = "Hello, World!"
print(s[0:5])  # Output: Hello


2. Strings with Negative Index

print(s[-6:])  # Output: World!
print(s[:-7])  # Output: Hello,

Common String Operations


1. Concatenation

str1 = "Hello"
str2 = "World"
result = str1 + " " + str2
print(result)  # Output: Hello World


2. Repetitions

str1 = "Ha"
result = str1 * 3
print(result)  # Output: HaHaHa


3. Membership

print("ell" in s)  # Output: True
print("xyz" not in s)  # Output: True

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