Class 11 Computer Science — Chapter 8: STRINGS

What you'll learn

• ▸String Creation and Syntax
• ▸Accessing Characters with Indexing
• ▸String Immutability
• ▸String Operations: Concatenation and Repetition
• ▸String Membership Testing
• ▸String Slicing
• ▸Traversing a String
• ▸String Methods and Built-in Functions

Chapter Summary

--- PAGE 1 --- CHAPTER 8 STRINGS 8.1 INTRODUCTION We have studied in Chapter 5, that a sequence is an orderly collection of items and each item is indexed by an integer. Following sequence data types in Python were also briefly introduced in Chapter 5. • Strings • Lists • Tuples Another data type 'Dictionary' was also introduced in chapter 5 which falls under the category of mapping. In this chapter, we will go through strings in detail. List will be covered in Chapter 9 whereas tuple and dictionary will be discussed in Chapter 10. 8.2 STRINGS String is a sequence which is made up of one or more UNICODE characters. Here the character can be a letter, digit, whitespace or any other symbol. A string can be created by enclosing one or more characters in single, double or triple quote. Example 8.1 >>> str1 = 'Hello World!' >>> str2 = "Hello World!" >>> str3 = """Hello World!""" >>> str4 = '''Hello World!''' str1, str2, str3, str4 are all string variables having the same v…

Practice Questions from this Chapter

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1. Explain why strings are immutable. Get Solution →
2. Show real-world string concatenation. Get Solution →
3. Discover how search engines use strings. Get Solution →
4. According to the text, which of the following can be used to create a string in Python? Get Solution →
5. What does the built-in function `len()` do when applied to a string? Get Solution →
6. The chapter describes strings as an immutable data type. What does 'immutable' mean? Get Solution →
7. Which operator is used to join two strings together in an operation called concatenation? Get Solution →
8. Which operator is used to repeat a string multiple times? Get Solution →

Did you know?

• 💡 Unicode can represent over 140,000 characters from almost every language.
• 💡 The longest word in English has 189,819 letters, describing a protein.
• 💡 Ancient scribes wrote long "strings" of text on papyrus scrolls.
• 💡 Early computers often stored text as numbers before converting them to characters.
• 💡 Morse code uses simple dots and dashes to form complex message strings.

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