STRINGS IN PYTHON

GROUP MEMBERS
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CONTENTS
╸ >>> Introduction
╸ >>> Definition
╸ >>> Creating
╸ >>> Indexing
╸ >>> Slicing
╸ >>> Concatenation
╸ >>> String Formatting
╸ >>> Escape Characters
╸ >>> String Methods
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INTRODUCTION
Initially when we started of learning about python, we dealt
more with numbers, technically integers;
But, in our real world, we tend to use a lot of sentences
than just numbers.
All these so called sentences are what we call “strings”.
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DEFINITION
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ᴓ Python string is the collection of the characters surrounded by single quotes,
double quotes, or triple quotes.
ᴓ The computer does not understand the characters; internally, it stores
manipulated character as the combination of the 0's and 1’s.
ᴓ Unlike some other languages, python doesn’t support char datatype, so strings
can be assumed as a list of char.
ᴓ Each character is encoded in the ASCII or Unicode character. So we can say
that Python strings are also called the collection of Unicode characters.

CREATING A STRING :
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OUTPUT :
• A string can be used directly into the print statement as well…
• As python has inbuilt ‘str’ datatype, when use the python script to find
database, it outputs as ‘str’

INDEXING IN A STRING
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• Each element of a string can be accessed and dealt with
separately using the concept of indexing.
• Square brackets can be used to access the elements of a string.
Find the output for the above code snippet ^^^
Again all these are the concept of considering ‘str’ as list of
‘char’.
With this same concept, we can even loop through all the
characters in a particular string.

SLICING OF STRINGS
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 We can return a range of characters by using the slice syntax / operation
 We need to specify the start index and the end index, separated by a colon, to return the
part of the string
 Remember index values always start from zero (0)
 For Example; OUTPUT
 We can also use the indices to print characters in a particular pattern. We need to add
another value called a step value next to the stop value.
 If required even negative index can be used.

STRING CONCATENATION
╸ To concatenate more than a string, we can simply use + operator
╸ Example ;
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STRING FORMATTING
• As we know we cannot combine different datatypes, without
typecasting.
• We can use the format() method, it takes passed arguments, formats
them and places them in the string where the placeholders { } are;
• This way, we can take a unlimited number of arguments and place
them in the string accordingly.
• We can number the placeholders for clarity

ESCAPE CHARACTERS
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 To insert characters that are illegal in a string, use an escape character
 An escape character is a ‘ ‘ backslash followed by the character you want to
insert
 For an example, if you want to use quotations inside a string, the interpreter
will misunderstand and throw an error, Instead use the escape characters just
before the required character to avoid that.
ERROR ;
CORRECTION ;

Some of the common escape characters used are mentioned below ;
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>>> ’ - to use a single quote
>>> ” - to use a double quote
>>> n - to start in a new line
>>> t - to leave a tab space
>>> b - to do a backspace
>>> ooo - to use a octal value
>>> xhh - to use a hexadecimal value

STRING METHODS
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Unlike other programming languages, python provides a
huge catalogue of features and inbuilt operations to make
the job easier;

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 capitalize() – converts the first character to upper case
 upper() – converts a string into upper case
 lower() – converts a string into lower case
 title() – converts the first character of every word to upper case
 strip() – removes all the spaces to the left and right of a string
 startswith() – returns true, if string starts with a specified value
 split() – splits the string at the specified separator and returns a list
 replace() – replaces a specified value with another value
 isalpha() – returns true, if all the characters are alphabets
 isupper() – returns true, if all the characters are in upper case
 islower() - returns true, if all the characters are in lower case
 count() – returns the number of times a specified character occurs

CREDITS and REFERENCES
Special thanks to all the people who made and released these
awesome resources for free:
╸ Presentation template by SlidesCarnival
╸ Photographs by Unsplash
╸ Illustrations by Pixsellz
╸ Images by Google Images
╸ Content by javatpoint.com and w3schools.com
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We appreciate everyone for
spending your valuable time and
attention … : )
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THANK YOU !

STRINGS IN PYTHON

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