Python Strings Tutorials and Quiz | Python String Indexing and Slicing

This section is based on Python Strings with MCQ Questions and Answers. Strings are sequences of characters, using the syntax of either single quotes or double quotes:

Introduction to Python strings

'hello'
"hello"
" Python String on Eduzip "

Indexing and Slicing with Strings

  • Because strings are ordered sequences it means we can grab sub-section of the string using indexing and slicing.
  • Indexing notation uses [] notation after the string (or variable assigned the string).
  • Indexing allows you to grab a single character from the string.
  • These actions use [] square bracket and a number index to indicate positions of what you wish to grab.

Character:          e    d     u     z     i      p
Index:                  0     1     2     3     4     5
Reverse Index:  0    -5    -4    -3    -2    -1

    

  • Slicing allows you to grab a subsection of mulple characters, a "slice" of the string.
  • This has the following syntax: [START:STOP:STEP]
  • START is a numerical index for this slice start
  • STOP is the index you will go up to (but not include)
  • STEP is the size of the "jump" you take.

Indexing and Slicing Examples

String Properties and Methods

Python has quite a few methods and properties that string objects can call to perform frequency occurring task (related to string). For example, if you want to capitalize the first letter of a string, you can use capitalize() method.

List of String Methods

Method Description
Python String capitalize() Converts first character to Capital Letter
Python String center() Pads string with specified character
Python String casefold() converts to casefolded strings
Python String count() returns occurrences of substring in string
Python String endswith() Checks if String Ends with the Specified Suffix
Python String expandtabs() Replaces Tab character With Spaces
Python String encode() returns encoded string of given string
Python String find() Returns the Highest Index of Substring
Python String format() formats string into nicer output
Python String index() Returns Index of Substring
Python String isalnum() Checks Alphanumeric Character
Python String isalpha() Checks if All Characters are Alphabets
Python String isdecimal() Checks Decimal Characters
Python String isdigit() Checks Digit Characters
Python String isidentifier() Checks for Valid Identifier
Python String islower() Checks if all Alphabets in a String are Lowercase
Python String isnumeric() Checks Numeric Characters
Python String isprintable() Checks Printable Character
Python String isspace() Checks Whitespace Characters
Python String istitle() Checks for Titlecased String
Python String isupper() returns if all characters are uppercase characters
Python String join() Returns a Concatenated String
Python String ljust() returns left-justified string of given width
Python String rjust() returns right-justified string of given width
Python String lower() returns lowercased string
Python String upper() returns uppercased string
Python String swapcase() swap uppercase characters to lowercase; vice versa
Python String lstrip() Removes Leading Characters
Python String rstrip() Removes Trailing Characters
Python String strip() Removes Both Leading and Trailing Characters
Python String partition() Returns a Tuple
Python String maketrans() returns a translation table
Python String rpartition() Returns a Tuple
Python String translate() returns mapped charactered string
Python String replace() Replaces Substring Inside
Python String rfind() Returns the Highest Index of Substring
Python String rindex() Returns Highest Index of Substring
Python String split() Splits String from Left
Python String rsplit() Splits String From Right
Python String splitlines() Splits String at Line Boundaries
Python String startswith() Checks if String Starts with the Specified String
Python String title() Returns a Title Cased String
Python String zfill() Returns a Copy of The String Padded With Zeros
Python String format_map() Formats the String Using Dictionary
Python any() Checks if any Element of an Iterable is True
Python all() returns true when all elements in iterable is true
Python ascii() Returns String Containing Printable Representation
Python bool() Coverts a Value to Boolean
Python bytearray() returns array of given byte size
Python bytes() returns immutable bytes object
Python compile() Returns a Python code object
Python complex() Creates a Complex Number
Python enumerate() Returns an Enumerate Object
Python filter() constructs iterator from elements which are true
Python float() returns floating point number from number, string
Python input() reads and returns a line of string
Python int() returns integer from a number or string
Python iter() returns iterator for an object
Python len() Returns Length of an Object
Python max() returns largest element
Python min() returns smallest element
Python map() Applies Function and Returns a List
Python ord() returns Unicode code point for Unicode character
Python reversed() returns reversed iterator of a sequence
Python slice() creates a slice object specified by range()
Python sorted() returns sorted list from a given iterable
Python sum() Add items of an Iterable
Python zip() Returns an Iterator of Tuples

Strings FAQs

1. Are strings mutable?

Strings are not mutable! (meaning you can't use indexing to change individual elements of a string)

2. How do I create comments in my code?

You can use the hashtag # to create comments in your code

1. What is used to concatenate two strings in Python?
[A] . operator
[B] + operator
[C] strcat() function
[D] ^ operator
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2.

What is the output of the following program?


names = "{1}, {2} and {0}".format('John', 'Bill', 'Sean')
print(names)

[A] John, Bill and Sean
[B] Bill, Sean and John
[C] John, Bill
[D] Bill, Sean
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3. Strings are immutable.
[A] True
[B] False
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4. If s='hello' what is the output of s[1]
[A] 'h'
[B] 'e'
[C] 'l'
[D] 'o'
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5. If s='Eduzip' what is the output of s[2:]?
[A] 'duzip'
[B] 'uzip'
[C] 'zip'
[D] 'ip'
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