String methods in Python
In Python, a string is a sequence of characters. Strings are used to represent text, and are often used to store and manipulate data.
1 – str.upper():
This method returns a copy of the string with all uppercase letters. For example:
2 – str.lower():
This method returns a copy of the string with all lowercase letters. For example:
3 – str.capitalize():
This method returns a copy of the string with the first letter capitalized and all other letters in lowercase. For example:
4 – str.strip():
This method returns a copy of the string with leading and trailing whitespace removed. For example:
5 – str.replace(old, new):
This method returns a copy of the string with all occurrences of the old string replaced with the new string. For example:
6 – str.split(separator):
This method returns a list of the words in the string, using the specified separator string as the delimiter. If separator is not specified, the method uses any whitespace as the delimiter. For example:
7 – str.join(iterable):
This method returns a string in which the elements of the iterable are joined with the string on which the method is called. For example:
8 – str.startswith(prefix):
This method returns True if the string starts with the specified prefix, and False otherwise. For example:
9 – str.endswith(suffix):
This method returns True if the string ends with the specified suffix, and False otherwise. For example:
10 – str.find(sub):
This method returns the index of the first occurrence of the sub string within the string, or -1 if the sub string is not found. For example:
11 – str.index(sub):
This method works like str.find(), but raises a ValueError exception if the sub string is not found. For example:
12 – str.isdigit():
This method returns True if the string consists solely of digits, and False otherwise. For example:
13 – str.isalpha():
This method returns True if the string consists solely of alphabetical characters, and False otherwise. For example:
14 – str.isalnum():
This method returns True if the string consists solely of alphabetical characters and digits, and False otherwise. For example:
15 – str.isspace():
This method returns True if the string consists solely of whitespace characters, and False otherwise. For example:
In summary, a string in Python is a sequence of characters that can be manipulated and stored using various methods and operations. Strings are an important data type in Python, and are widely used in many applications.
I hope these examples help you understand some of the common string methods in Python. If you have any questions, please let me know in the comment.