Page 348 - Computer Science V2.0 Class 11

12 STRINGS

Chapter Outline

12.1 String 12.2 String Slices
12.3 String Methods 12.4 Case Study

Introduction

Data types such as int, float, complex, and bool are called scalar data. In addition to the aforementioned scalar data
types, we have already seen examples of strings. For instance, we used strings to document our programs and produce
outputs. In this chapter, we will learn more about strings.

12.1 String

Python built-in type str enables us to deal with the strings in a Python program. A str instance is a string of text
enclosed between single or double quotes. In this book, we prefer to use single quotes. Next, we give some examples
of strings:

>>> 'Block-A, HouseNo #177, Pitampura, Delhi-110034'
'Block-A, HouseNo #177, Pitampura, Delhi-110034'
>>> 'shyam@gmail.com'
'shyam@gmail.com'
>>> 'Hello"How are you?"I am good, how are you?'
'Hello"How are you?"I am good, how are you?'
>>> print('Hello\nHow are you?\nI am good, how are you?')
Hello
How are you?
I am good, how are you?

A str instance is a string of text enclosed between single or double quotes.

Note that a string may include special characters. The preceding example illustrates, when a string includes the
character sequence \n, the print() function transfers the print control to the next line for each occurrence of the
character sequence \n. When a string is enclosed between single quotes, a double quote mark may be included as part
of the string. However, to include a single quote ('), it should be preceded by a backslash (\) character. For example,

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