Python Strings: A Beginner's Guide to String Manipulation | Lecture 12

In this video, we will learn about strings in Python. Strings are a sequence of characters, and they are one of the most basic and important data types in Python. We will cover the following topics: • How to create strings • String indexing • The slice operator • Deleting strings • Adding strings • Finding the length of a string We will also provide examples of how to use these string operations in Python code. String Indexing Strings can be indexed, which means that you can access individual characters in a string by their position. The position of a character in a string is called its index. The index of the first character in a string is 0, the index of the second character is 1, and so on. For example, the string "hello" has the following indices: 0: h 1: e 2: l 3: l 4: o You can access a character in a string by using its index. For example, to access the first character in the string "hello", you would use the following code: Python string = "hello" first_character = string[0] print(first_character) This code will print the letter h. The Slice Operator The slice operator is used to extract a substring from a string. A substring is a part of a string. The slice operator is used to specify the start and end indices of the substring you want to extract. The syntax for the slice operator is: string[start:end] The start index is the index of the first character you want to include in the substring. The end index is the index of the character after the last character you want to include in the substring. For example, the following code extracts the substring "ell" from the string "hello": Python string = "hello" substring = string[1:3] print(substring) This code will print the string ell. Deleting Strings You can delete a string in Python using the del keyword. The del keyword can be used to delete a string variable, or it can be used to delete a substring from a string. To delete a string variable, you would use the following code: Python string = "hello" del string This code will delete the string variable string. To delete a substring from a string, you would use the slice operator with a start index and an end index of -1. The -1 index refers to the last character in the string. For example, the following code deletes the substring "ell" from the string "hello": Python string = "hello" del string[1:3] print(string) This code will print the string heo. Adding Strings You can add strings in Python using the + operator. The + operator will concatenate two strings, which means that it will combine them into a single string. For example, the following code adds the strings "hello" and "world" together: Python string1 = "hello" string2 = "world" combined_string = string1 + string2 print(combined_string) This code will print the string "helloworld". Finding the Length of a String You can find the length of a string in Python using the len() function. The len() function returns the number of characters in a string. For example, the following code finds the length of the string "hello": Python string = "hello" length = len(string) print(length) This code will print the number 5, which is the length of the string "hello". Conclusion In this video, we learned about strings in Python. We covered the following topics: • How to create strings • String indexing • The slice operator • Deleting strings • Adding strings • Finding the length of a string We also provided examples of how to use these string operations in Python code. I hope you enjoy this video and learn something new. If you do, please like, share, and subscribe to my channel for more Python tutorials. Thank you for watching! And Follow on social media: ✅ Twitter : https://twitter.com/CyberSecur35108?t... ✅ Instagram: https://instagram.com/cybersecuretec?... ✅ Facebook Group: https://www.facebook.com/groups/96787... #python #pythonstrings #pythonstring #pythonprogramming

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