This is presentation, that covers all the important topics related to strings in python. It covers storing, slicing, format, concatenation, modification, escape characters and string methods. The file attatched also includes examples related to the slides shown.

1. Python strings
A QUICK RECAP
PRESENTED BY:
S.VEDA GAYATHRI
B.TECH (2nd)
Electronics and Instrumentation
engineering
NIT SILCHAR

2. A QUICK GLANCE OVER:
• PYTHON Strings
• Slicing Strings
• Modify Strings
• Concatenate Strings
• Format Strings
• Escape Characters
• String Methods

3. Python Strings
 A String is an array of characters, represented by quotation marks (‘ ’)or
double quotation marks (“ ”) .
 A string in python is a data type (str) or can also be used as a string literal.
How do we create a string and display it?
How do we create multiline strings?

4. Storage of strings
• Strings are stored as arrays
• Traversing through a string and accessing its elements can be done
using its indices.
• There is no character data type in python , it stores as a string of length
1.
How do we determine the length of the string?: len()
How do we check if a required word/letter is there in the
string?:keywords “in” & “not in”
How do we get the string printed in a desired range?
A[1]
A[0] A[2] A[3] A[4] A[5]

5. Slicing strings
• If a range of characters in a string are required slicing is used.
• The syntax for slicing is
strName[start:end]
• Here,
• strName is the name of the string
• Start is the index of the starting letter of range
• End is the index of the ending letter of range
How do we use slice syntax if we count from the end?
Negative indexing

6. Modify strings
• Few basic modifications that can be done to the strings
Upper() : Converts string to upper case letters
Lower(): Converts string to lower case letters
Strip(): Remove whitespaces in beginning or in the end
Replace(,): Replaces a string with another string
Split(): Seperates string if it finds a separator
• The functions are used on a particular string with a dot operator.
strName.upper()

7. Concatenation of strings
• Joining two different strings/data types is called Concatenation.
• Concatenation of different datatypes is not possible in python.
• This concatenation is done using ‘+’
• If two variables are of str data type they can be concatenated easily
with ‘+’
How do we perform addition of numbers with same operator?
Type Casting
How do we concatenate string and a number?

8. Format Strings
• Strings and the numbers can be linked using format method.
• It reserves a place for the number in the string using place holder with
curly braces { }
• The numbers are further assigned as the arguments passed through
the format()
• Values can be assigned to place holder to get the required order.

9. Escape Characters
• There are some illegal characters that we cannot use inside a string.
• Eg: the quotation marks , backslash etc..
• To insert the illegal characters , escape
character is used.
• It is a backslash followed by the illegal character.
• Some familiar escape characters:
Code Result
' Single Quote
Backslash
n New Line
r Carriage Return
t Tab
b Backspace
f Form Feed
ooo Octal value
xhh Hex value

10. THANK YOU!!!
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