INTRODUCTION TO PYTHON STRINGS

• 15 June 2023
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Strings in Python are a fundamental data type used to represent and manipulate textual data. A string is a sequence of characters enclosed in single quotes (”), double quotes (“”) or triple quotes (”’ ”’).

Strings can be created by assigning a value enclosed in quotes to a variable.

For example:

message = "Hello, World!"

Python treats strings as immutable objects, meaning that once a string is created, it cannot be modified. However, various string manipulation operations can be performed to extract information or create new strings.

String concatenation is a common operation where two or more strings are combined to create a single string. This can be done using the + operator or by simply placing the strings next to each other. 

For example:

greeting = "Hello"
name = "Alice"
message = greeting + ", " + name + "!"

Python provides a rich set of built-in string methods for performing various operations on strings. These methods include 'upper()' and 'lower()' for changing the case of the string, 'split()' for splitting a string into a list of substrings, 'join()' for joining a list of strings into a single string, and many more.

String formatting is used to create dynamic strings by incorporating variable values into the string. Python provides different approaches for string formatting, including the '%' operator, the 'format()' method, and f-strings. 
For example:

name = "Bob"
age = 25
message = "My name is %s and I'm %d years old." % (name, age)
Python strings support a wide range of escape sequences, such as \n for a new line, '\t' for a tab, '\"' and '\' 'for including quotes within a string, and \\ for a literal backslash.