Operation on Strings

In Python, strings support a variety of operations and methods for manipulation

1. Concatenation:

Combining two or more strings together.

str1 = "Hello"
str2 = "World"
result = str1 + ", " + str2  # 'Hello, World'

2. Repetition:

Repeating a string multiple times.

original = "abc"
repeated = original * 3  # 'abcabcabc'

3. Slicing:

Extracting a portion of a string using indexing.

message = "Python is awesome"
substring = message[7:10]  # 'is '

4. Length:

Finding the length of a string.

text = "Python"
length = len(text)  # 6

5. String Methods:

Python provides various built-in string methods for manipulation, including:

• upper(): Converts all characters to uppercase.
• lower(): Converts all characters to lowercase.
• replace(old, new): Replaces occurrences of old with new.
• find(substring): Returns the index of the first occurrence of substring (or -1 if not found).
• split(separator): Splits the string into a list of substrings using the specified separator.
• strip(): Removes leading and trailing whitespaces.

phrase = "Python is easy to learn"
upper_case = phrase.upper()  # 'PYTHON IS EASY TO LEARN'
lower_case = phrase.lower()  # 'python is easy to learn'
replaced = phrase.replace("easy", "fun")  # 'Python is fun to learn'
index_of_learn = phrase.find("learn")  # 15
words = phrase.split()  # ['Python', 'is', 'easy', 'to', 'learn']
stripped = "   hello   ".strip()  # 'hello'

6. String Formatting:

Combining variables or expressions with a string.

name = "Alice"
age = 25
message = f"My name is {name} and I am {age} years old."

7. Checking Substrings:

Checking if a substring is present in a string.

text = "Python is powerful"
contains_python = "Python" in text  # True

8. Conversion:

Converting other data types to strings.

num = 42
str_num = str(num)  # '42'

9. Escape Characters:

Using escape characters to include special characters in a string.

multiline_text = "This is a\nmultiline\nstring."

10. String Comparison:

Comparing strings lexicographically.

str1 = "apple"
str2 = "banana"
is_greater = str1 > str2  # False

Understanding these operations and methods allows you to manipulate and process strings effectively in Python. Strings are a fundamental part of programming and are used in various applications, from simple text processing to complex data handling.