Modifying Strings in python

Problem: Explain the methods and techniques available in Python for modifying strings. Provide examples of how to perform common string operations such as concatenation, slicing, replacing, and converting to uppercase/lowercase.
Solution:Python provides various methods and techniques for modifying strings. Here are some common operations:

Concatenation:

You can combine two or more strings using the + operator.

strl = " Hello" 
str2 = " World" 
result = strl + str2
print (result) # " Hello World"

Uppercase and Lowercase:

You can convert a string to uppercase or lowercase using the upper() and lower() methods.

word = " Hello"
upper_word = word.upper( )
lower_word = word.lower( )
print (upper_word) # " HELLO" 
print (lower_word) # " hello"

Replacing:

You can replace substrings within a string using the replace() method.

sentence ="I love programming in Python."
modified =sentence.replace("Python" , "Java" )
print (modified) # " I love programming in Java . "

Slicing:

You can extract a portion of a string usi ng slicing. Slicing uses the format [start:end], where start is inclusive, and end is exclusive.

text = " Python is awesome" 
sliced = text[7 : 10]
print (sliced) # " is "

String Interpolation:

You can modify strings by inserting variables using fstrings (Python 3.6+).

word = " Hello" 
upper_word = word.upper() 
lower_word = word.lower() 
print(upper_word) # " HELLO" 
print(lower_word) # " hello"

Stripping Whitespace:

You can remove leading and trailing whitespace using strip(), lstrip(), and rstrip().

text = "This is a sentence with whitespace ."
stripped_text = text.strip()
print (stripped_text) # " This is a sentence with whitespace ."

Modifying Strings in python