Python
Variable
Declaration and Operator
Fill in the blanks
1. How many operator presents in
python 6
2. Str=’Hello world’.str[2:5] = llo
3. Str =”Mother”. Str[-5]= o
4. S=”python”.s*3= pythonpythonpython
5. S1=’hai’,s2=’hello’ .Write the output
of string concatenation haihello
6. What is Concatenation operator +
7. a=”happy morning”. a[-5:11]= orni
8. a=5.0 . type(a) = <type ‘float’>
9. List is Mutable
10.
Tuple is Immutable
11.
List & Tuple index starts from
0 index
12.
s=[3,8,2,1,9,5,7]. a[1:]=
8,2,1,9,5,7
13.
List bracket [square bracket] , Tuple bracket (Open & close bracket)
14.
String is immutable
15.
Collection of character is called String
16.
Set is Collection of unique items
17.
Write a syntax of Dictionary
key:value
18.
A={2,2,2,2,5,6,5,7,7,8,8,8,9}.what is the output of above set = set([2,5,6,7,8,90])
19.
B={‘school’:’student’,’book’:’maths’}.B[‘book’]= maths
20.
int(-100.7).what is the output of the type conversion -100
21.
print(2,3,6,9,sep=’@’,end=’*’).write the output = 2@3@6@9*
22.
print(‘I had visited {1},{0} and {2}’.format(‘chennai’,’theni’,’madurai’)) I had visited theni,chennai and madurai
23.
x=45.89344354.print(‘%3.2f’%x) =
45.89
24.
a=2,b=3; a**b = 8
25.
a=5;b=2;a//b = 2
26.
a=5;b=2;a/b = 2.5
27.
x=6;y=6; print(x is y)= True
28.
c={1:56,3:7}.print(7 in c) = False
29.
x=’welcome’.print(‘m’ not in x) =
False
30.
a=[4,5,6].b=[4,5,6].print(a is not b)= False
Answer the following Question
(4
marks)
1.write arithmetic operator program
x = 15
y = 4
print('x + y = ',x+y)
print('x - y = ',x-y)
print('x * y =',x*y)
print('x / y =',x/y)
print('x // y
=',x//y)
print('x ** y
=',x**y)
2.write bitwise operator program
x =2
y = 3
print('x & y
= ',x&y)
print('x | y = ',x|y)
print('x ^ y =',x^y)
print('~x =',~x)
print('x <<2
=',x<<2)
print('x >> y
=',x>>y)
3.write Comparison operator program
x=10
y=12
Print('x>y is', x>y)
Print('x<y is', x<y)
Print('x==y is', x==y)
Print('x!=y is' ,x!=y)
Print('x>=y is', x>=y)
Print('x<=y is', x<=y)
4.write logical operator program
|
Operator |
Meaning |
Example |
|
And |
True if
both the operands are true |
X and Y |
|
Or |
True if
either of the operands is true |
X or Y |
|
Not |
True if
operands is falce(complements the operand) |
not X |
EXAMPLE:
X=True
y=False
print('x and y is', x and y)
print('x or y is', x or y )
print('not x is', not x)
5.write assignment operator program
|
Operator |
Example |
Equivalent
to |
|
+= |
X+=5 |
X=X+5 |
|
-= |
X-=5 |
X=X-5 |
|
*= |
X*=5 |
X=X*5 |
|
/= |
X/=5 |
X=X/5 |
>>> a=6
>>> a+=3
>>> a
9
>>> a-=2
>>> a
7
>>> a*=3
>>> a
21
>>> a/=3
>>> a
7.0
Answer the following Question
(10
marks)
1.what is operator ?. Write 6 operator Program.
6 Type Of Operators In Python
¨ Arithmetic Operator
¨ Comparison (Relational) Operator
¨ Logical Operator
¨ Bitwise Operator
¨ Assignment Operator
¨ Special Operator
Arithmetic Operator
arithmetic operator are used to perform mathematical operation like
addition, subtraction, multiplication etc.
|
Operator |
Meaning |
Example |
|
+ |
Add two
operands |
X+y+2 |
|
- |
Subtract
right operand from the left |
x-y-2 |
|
* |
Multiply
two operands |
X*y |
|
/ |
Divide
left operand by the right one |
x/y |
|
% |
Modulus-remainder
of the division of left operand to the right |
X%y |
|
// |
Floor
divison-division that result into whole number adjusted to the left in the
number line |
x//y |
|
** |
Exponent-left
operand raised to the power of right |
X**y |
Example:
x = 15
y = 4
print('x + y = ',x+y)
print('x - y = ',x-y)
print('x * y =',x*y)
print('x / y =',x/y)
print('x // y
=',x//y)
print('x ** y
=',x**y)
output :
x + y = 19
x - y = 11
x * y = 60
x / y = 3.75
x // y = 3
x ** y = 50625
Comparison Operator:
comparison operators are used to compare values. it either returns true
or false according to the condition.
|
Operator |
Meaning |
example |
|
> |
Greater
than-true if left operand is greater than the right |
X >
y |
|
< |
Less
than - true if left operand is less than the right |
X <
y |
|
== |
Equal
to - true if both operands are equal |
X == y |
|
!= |
Not
equal to-true if operands are not equal |
X!=Y |
|
>= |
Greater
than or equal to-true if left operand is greater than or equal to the right |
X>=Y |
|
<= |
Less
than or equal to-true if left operand is less than or equal to the right |
X <=
y |
Example:
X=10
Y=12
Print('x>y is', x>y)
Print('x<y is', x<y)
Print('x==y is', x==y)
Print('x!=y is' ,x!=y)
Print('x>=y is', x>=y)
Print('x<=y is', x<=y)
OUTPUT
X>Y is false
x<y is true
x==y is false
x!=y is true
x>=y is false
LOGICAL OPERATORS
|
Operator |
Meaning |
Example |
|
and |
True if
both the operands are true |
X and Y |
|
or |
True if
either of the operands is true |
X or Y |
|
not |
True if
operands is falce(complements the operand) |
not X |
EXAMPLE:
X=True
y=False
print('x and y is', x and y)
print('x or y is', x or y )
print('not x is', not x)
OUTPUT
x and y is false
x or y is true
not x is false
BITWISE OPERATORS
|
Operator |
Meaning |
Example |
|
& |
Bitwise
AND |
X&Y=0(0000
0000) |
|
| |
Bitwise
Or |
X/Y=14
(0000 0000) |
|
~ |
Bitwise
NOT |
~X=-11
(1111 0101) |
|
^ |
Bitwise
XOR |
X^ y=
14 (0000 1110) |
|
>> |
Bitwise
right shift |
X>>2=2(0000
0010) |
|
<< |
Bitwise
left side |
X<<2=
40 (0010 1000) |
Example:
x =2
y = 3
print('x & y
= ',x&y)
print('x | y = ',x|y)
print('x ^ y =',x^y)
print('~x =',~x)
print('x <<2
=',x<<2)
print('x >> y
=',x>>y)
output
x & y = 2
x | y = 3
x ^ y = 1
~x = -3
x <<2 = 8
x >> y = 0
ASSIGNMENT OPERATORS:
|
Operator |
Example |
Equivalent
to |
|
+= |
X+=5 |
X=X+5 |
|
-= |
X-=5 |
X=X-5 |
|
*= |
X*=5 |
X=X*5 |
|
/= |
X/=5 |
X=X/5 |
>>> a=6
>>> a+=3
>>> a
9
>>> a-=2
>>> a
7
>>> a*=3
>>> a
21
>>> a/=3
>>> a
7.0
SPECIAL OPERATORS
Identity Operators
|
OPERATOR |
MEANING |
EXAMPLE |
|
is |
True if
the operands are identical |
X is
true |
|
is not |
True if
the operands are not identical |
X is
not true |
example
x1=5
y1=5
x2='Hello'
y2='Hello'
x3=[1,2,3]
y3=[1,2,3]
print(x1 is not y1)
print(x2 is y2)
print(x3 is y3)
output
False
True
False
Membership Operator
|
OPERATOR |
MEANING |
EXAMPLE |
|
in |
True if
value/variable is found in the sequence |
5 in x |
|
not in |
True if
value/variable is not found in the sequence |
5 not
in x |
x="Hello world"
y={1:'a',2:'b'}
print('H' in x)
print('hello' not in x)
print(1 in y)
print('a' in y)
output
True
True
True
False
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