Use
print for all syntax:
Identity
operator:
1)Python
have tow identity operator:is’is not
Example:x=10
Y=10
If x is y
Orther
ex:x=10
Y=20
If x is y
Is not
example:
If x is not
y:
Next
topic: printing of a variable&string formatting:
Example:
Name=”phython”
Year=2020
Easy Printing
type:
Print(f”name: {name} year: {year}”)
Topic:input
function
We want
work calculator or programme calculator use this method:
Do not
use this method:a=input(‘enter first number’)=10
B=input(‘enter second number’)=20
Ans=a+b=10=20
Print(ans)=1020
Use this
method:
>>>a=int(input())
10
>>>b=int(input())
20
Ans=a+b
30 this is the correct method
Topic:arithemetic
operators
In
python arithemetic operators have
For
addition:+
Subtraction:
-
Multiplication:
*
Division:/ for division this type of slash only use /
Topic:power
operator
** this
the power operator of python
Example:
10**2=10power
2=100
5**3=5
power 3=125
Topic:floor
division operator
// is
the floor division operator of python
Example:
floor(4)=4
floor(4.5)=4
normal
division example:
(10/2)=5.0
(20/5)=4.0
Floor
division ex:
(5//2)=2
Topic:assignment
operators:
Name=”python”
Age=3
Price=0.00
(name)
“python”
(age)
3
(price)
0.00
We can
do multiple assignment in python
Num1=num2=num3=0
(num1,num2,num3)
000
Multi
value assignment:
This is
basic assignment operator:
Name, pagecount,
price= ”aaqil”, 300, 245.67 you want to
space after coma you did not do like this: page
count you did not use space
while write string
(name,pagecount,price)
('python',
300, 245)
Topic:dicision
making
Types of
decision making statements:
*if
*if else
*nested
if-else
*etc
Topic:needs
of comments;
Comment
is use to understand code
You want
to command to tell what you do
You want
to command before code
To add
command use #
Ex: #
app developer aaqil
Topic:escape
sequence:
For new
line to print: use n:and you want to use print in all escape cequeans
Print( “hello\nworld”
)
Hello
World
For
print after 4 space:print(“ \t “)
Print(“hello\tjack”)
Hello jack
For
Single cotasion print:print(“ \” \””)
Print('hello\'hello\'')
hello'hello'
for
double cotasion print:print(“ \”
\””)
print("hello\"hello\"")
hello"hello"
for
slash print:print( \\ “)
print("hello\\hello")
hello\hello
how to
print string without escape sequence:
example:
print(c:desktop\new.txt’)
n is
escape sequence so ew.txt ws print in new line:
we want
to use r befor c:
print(r’c:\desktonew.txt’)
c:\desktop\new.txt’)
r is use
to ignoor escape seqences
topic:indexing strings
example:
str=”phython”
in this
string having six character
in this
string have index 0 t0 index 5
in this
index we can acsess the string using the index number
example:
str=”phython”
print(“1st
character”,str[0])
1st
character p
Print(“4th
character “,str[3])
4h
character h
Print(str[100])
You
print more than the chareter index means thorough
Out of
range
We can
identify the character index in reverse numbers
Like
this:
P y
t h o n
-6 -5 -4
-3 -2 -1
Example:
Str=”phython”
Print(“last
character”,str[-1])
last
charecter n
topic:slicing
string in python:
we can
use slicing to slice a character with thenumber of string
befor
the string number there was no numbers means python take as [0: ]
example:
[:3] as [0:3]
and
after the string number there was no number means python takes upto the last
number of the string number::
example:
str=”python”
the
string python have:0to5 in forward
and-1to-6
in reverse
next:
str=”python”
print(str[:3])
this python take as[ 0:3]
ans:pyt
print(str[-4:])
this python takes as[-4:-1]
ans:tho
we can
not print the last string in python
and you
want to print (str[0:3]) means
you got
this type of ans:pyt but you did not get
pyth.python
print the number we have enter at the last
before
the number string will print in forward and reverse
topic:string
methods:
we are
going find the length of string:
str=”python”
print(len(str))
ans=6
replace
a string:
str=”python”
new_str
= str.replace("t", "T")
print(new_str)
pyTHon
remove
whitespace:
str ”
python ”
print(str.strip())
change
string to upper case and lower case:
this
is use to change small letter to capital letter capital letter to small letter
example:
str=”python”
print(str.upper())
ans:PYTHON
str=”PYTHON”
print(str.lower())
ans:python
split
the string function:
str=”python,programme”
print(str.split(“,”))
ans:[‘python’,
’programme’]
str=”python-scripting-language”
print(str.split(“-“))
ans:[‘python’,’scripting’-‘language’]
topic:list
we
can use one list to collect all data and store data
syntax:
variable=[item1,item2,itemn]
example:
colors=[“red”,”blue”,”green”]
print
the list:
print=(colors)
ans:['hello',
'hell', 'hel', 'he', 'him']
orther
ex:
data=[“python”,3.45,2018]
print(data)
['python',
3.0, 2018]
Hint:you
can not use number as vareables
You
can use any letter and word as variable
Topic:Indexting
list:
I
want to print 1st number means I want to use 0
I
want to print 4th number means I want to use 3
Example:
Numbers=[10,
20, 30, 40, 50]
Print
(“1st number “, number[0])
Ans:1st
number 10
Print(“4th
number “, number[3])
Ans:4th
number 40
written by aaqil
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