Class 11 Computer Science — Chapter 8: STRINGS

What you'll learn

• ▸String Definition and Creation
• ▸Accessing Characters using Indexing
• ▸String Immutability
• ▸String Concatenation
• ▸String Repetition
• ▸String Membership Testing
• ▸String Slicing
• ▸Traversing a String
• ▸The len() Function

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 val…

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Show string concatenation examples. Get Solution →
2. Access string characters using negative indices. Get Solution →
3. Explain string immutability simply. Get Solution →
4. According to the text, what is a string in Python? Get Solution →
5. Which operator is used for string concatenation in Python? Get Solution →
6. What does the `len()` function return when used on a string? Get Solution →
7. What is the index of the first character in a Python string? Get Solution →
8. Which of the following describes the 'immutable' property of strings? Get Solution →

Did you know?

• 💡 Unicode allows computers to represent almost every character in every human language.
• 💡 Ancient scribes carved immutable texts into stone tablets for lasting records.
• 💡 Morse code translates letters and numbers into sequences of dots and dashes.
• 💡 Early computers often stored text by assigning each letter a unique number.
• 💡 The longest word in English without a vowel is "rhythms".

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