String Operations

 

In Python, a string is a sequence of characters enclosed within either single or double quotes. Strings can contain spaces, digits, and special characters. Strings can be assigned to variables and treated as ordered sequences, allowing access to individual elements using index notation. Positive and negative indexing can be used to access elements from the beginning or end of the string, respectively.

Strings support various sequence operations, including slicing and striding, to extract substrings or sequences of characters. The len() function can be used to determine the length of a string. Strings can be concatenated using the addition operator (+) and replicated using the multiplication operator (*).

Strings are immutable, meaning their values cannot be changed in-place. However, new strings can be created by combining or modifying existing strings. Escape sequences, represented by backslashes (), allow the inclusion of special characters like newline (\n) and tab (\t) within strings. To include a literal backslash, use a double backslash (\) or prefix the string with 'r' to denote a raw string.

Strings in Python have built-in methods that can be applied to manipulate or extract information from strings. For example, the upper() method converts all characters in a string to uppercase, while the replace() method substitutes a specified substring with another string. The find() method searches for a substring within a string and returns its index, or -1 if the substring is not found.

These are some common operations and methods used with strings in Python, providing versatile ways to work with text data.