Python Fundamental 02- strings

Python sting:

Value of variable in between quotation anything is string

we can use single quotation marks' or double quotation marks " to mention a string in python.

print("Upoma")

print('Upo')

Assign String to a Variable: We can assigning a string to a variable is done with the variable name followed by an equal sign and the string:

Name = '"upoma"

print(Name)

Multiline Strings: We can assign a multiline string to a variable by using three quotes in the first & last:

Details = """ I

Am

A student

Of Data nerd."""

print (Details)

 Python - Slicing Strings

We have to use Square brackets [] to access elements of the string.

Slicing use to pick a single character or any word or sentence as required from data.

X = "Ijaj Ahmed"

print(X[0])

X = "Ijaj Ahmed"

print(X[0:4])

X = "Ijaj Ahmed"

print(X[5:])

X = "Data Nerd"

print(X[5:12])

X = "Data.erd"

print(X[4])

b = "Data Science"

print(b[-8:])

String Length

Who_am_I = 'Upo'  #How many character & space have in string

print(len(Who_am_I))

Output: 3    #here, Upo = 3 characters.

 Python - Modify Strings

Upper Case

song = 'My name is Neki'

print(song.upper()) # All character convert to capital leter

Lower Case

Bangla_gan = 'Ami tar cholonai Vulbo Na'

print(Bangla_gan.lower()) ## All character convert to small letter

Remove Whitespace

Remove space from the end or first

Space_bad = " koto je tomake besechi valo" # first spaces removed

print(Space_bad.strip())

Replace String

Name = " Hikita"

print(Name.replace('H' , 'N')) #Replace character

Name = "Nikita"

Split String

All characters will be a different str which are seperated by mentioned special symble.

a = "Python, or, R" # here comma (,) is seperator

print(a.split(","))

What = "Azwaan-al-kab" # here dash(-) is seperator.

print(What.split("-"))

 Python - String Concatenation :  Combine one string with another string

First = "Azu1 " # Space generated by manually beside value of variable.

Second = "Al "

Third= 'Kab'

Best3 = First + Second + Third

print(Best3)

First = "He"

Second = "You"

Third= 'and Me'

Best3 = First + ' ' + Second + ' ' + Third #Space generated with Quotation between two plus (+) sign

print(Best3)

Python - Format - Strings

Roll = 5

details = "I am a student, My position is " + Roll

print(details)

# This code won't run because int will not add with a string

Format : combine strings and numbers

Roll = '5' #here every time need convert int into str

Details = "I am a student, My position is " + Roll

print(Details)

Roll1 = 10

Details = "I am a student, My position is {}" #here int directly can add with str with {}

print(Details.format(Roll1))

Distance= 5

transport = 2

rent= 45.5

village_to_town = "{}km road by {}no bus cost is {} taka."

print(village_to_town.format(Distance, transport, rent))

Distance= 5

transport = 2

rent= 45.5

village_to_town = "{2}km road by {0}no bus cost is {1} taka."

print(village_to_town.format(Distance, transport, rent))

Python - Escape Characters

statement = "I won't go with "Rabin"" # normal Quotation will not allow

print(statement)

Python - Escape Characters

statement = "I won't go with \"Rabin\"" #normal quotation will allow with slash \

print(statement)

# Escape Characters

# \' Single Quote

txt = 'It\'s alright.'

print(txt)

# \\ Backslash

pip_pip = "This will insert one \\ (backslash)."

print(pip_pip )

# \n New Line

message = "My name is:\nUpoma \n"

print(message)

# \r Carriage Return

#\r Character taking its right side data into the first of the line

#and right side data removing same amount of data from the first of that line.

txt = "Hello\r World!"

print(txt)

txt = "I am Upoma \r And" #Actual result come in jupyter = And Upoma

print(txt)

# \t Tab # tab make space between two sides

txt = "Hello\tWorld!"

print(txt)

# \b Backspace # \b remove one space from its left side

txt = "Hello \bWorld!"

print(txt)