NCERT Solutions Class 11 Computer Science Chapter 5 Getting Started with Python

first_number=int(input(“Enter First Number: “))

second_number=int(input(“Enter Second Number: “))

 

def swap(first_number,second_number):

third_variable=first_number

first_number=second_number

second_number=third_variable

returnfirst_number,second_number

print(swap(first_number,second_number))

 

first_number=int(input(“Enter First Number: “))

second_number=int(input(“Enter Second Number: “))

def swap(first_number,second_number):

first_number,second_number=second_number,first_number

returnfirst_number,second_number

print(swap(first_number,second_number))

 

a) 25 / 0 :- Runtime Error, because of divisible by zero

b) num1 = 25; num2 = 0; num1/num2 :- Runtime Error, because of divisible by zero

 

n=int(input(“Enter Number: “))

for i in range(n):

print(“GOOD MORNING “)

 

i) Serial_no. :- Invalid

Reason- (.) is not allowed in identifier

ii) 1st_Room :- Invalid

Reason- identifier can’t start with number

iii) Hundred$ :-  Invalid

Reason- We can’t use special symbol $ in identifier

iv) Total Marks :- Invalid

Reason- We can’t use space between in identifier

v) Total_Marks :- Valid

Reason- We can use underscore between in identifier

vi) total-Marks :- Invalid

Reason- We can’t use hyphen between in identifier

vii) _Percentage:- Invalid

Reason- Identifier can’t begin with underscore

viii) True :- Invalid

Reason- We can’t use keyword as a identifier

 

a) Assign 10 to variable length and 20 to variable breadth.

length = 10

breadth = 20

b) Assign the average of values of variables length and breadth to a variable sum.

Sum = (length + breadth)/2

c) Assign a list containing strings ‘Paper’, ‘Gel Pen’, and ‘Eraser’ to a variable stationery.

Stationary=[‘Paper’ ,  ‘Gel Pen’ , ‘Eraser’

d) Assign the strings ‘Mohandas’, ‘Karamchand’, and ‘Gandhi’ to variables first, middle and last.

first = ‘Mohandas’

middle= ‘Karamchand’

last= ‘Gandhi’

e) Assign the concatenated value of string variables first, middle and last to variable fullname. Make sure to incorporate blank spaces appropriately between different parts of names.

fullname = first +” “+ middle +” “+ last

 

 

 

 

x=int(input(“Enter First Number: “))

y=int(input(“Enter Second Number: “))

z=int(input(“Enter Third Number: “))

def  average(x,y,z):

avg=x+y+z/3

returnavg

print(“Average : “)

print(average(x,y,z))

 

a) num1 = 4

num2 = num1 + 1

num1 = 2

Output: 2,5

b) num1, num2 = 2, 6

num1, num2 = num2, num1 + 2

print (num1, num2)

Output: 6,4

c) num1, num2 = 2, 3

num3, num2 = num1, num3 + 1

print (num1, num2, num3)

Output: error

 

 

 

 

a) num1 += num2 + num3

print (num1)

Output:9

b) num1 = num1 ** (num2 + num3)

print (num1)

Output:1024

c) num1 **= num2 + num3

Output:1024

d) num1 = ‘5’ + ‘5’

print(num1)

Output:55

e) print(4.00/(2.0+2.0))

Output:1.0

f) num1 = 2+9*((3*12)-8)/10

print (num1)

Output:27.2

g) num1 = 24 // 4 // 2

print(num1)

Output:3

h) num1 = float(10)

print (num1)

Output:10.0

i) num1 = int(‘3.14’)

print (num1)

Output: error

j) print(‘Bye’ == ‘BYE’)

Output: False

k) print(10 != 9 and 20 >= 20)

Output:True

l) print(10 + 6 * 2 ** 2 != 9//4 -3 and 29

>= 29/9)

Output: True

m) print(5 % 10 + 10 < 50 and 29 <= 29)

Output: True

n) print((0 < 6) or (not(10 == 6) and

(10<0)))

Output: True

 

deffar_conv(t):

x=t*9/5 + 32

return x

print(far_conv(100))

 

The distance formula can be used to calculate the distance between the points where the dart hits the dartboard and the centre of the dartboard.
The distance of a point P(x, y) from the origin is given by x2+y2.

To calculate the square root, the equation can be raised to the power 0.5.

Program:
x = int(input('Enter X Coordinate: '))
y = int(input('Enter Y Coordinate: '))

dis = (x ** 2 + y ** 2) ** 0.5
#if dis is greater than 10, means that dart is more than 10 units away from the centre.
print(dis <= 10)

The output for the dart coordinates are as follows:
a) (0,0): True
b) (10,10): False
c) (6,6): True
d) (7,8): False

principal=int(input(“P=”))

rate=int(input(“I=”))

time=int(input(“T=”))

defamount_pay(principal,rate,time):

simple_intrest=(principal*rate*time)/100

TOTAL_amount=Print+simple_intrest

returnTOTAL_amount

print(“Total Payble amount”)

print(amount_pay(principal,rate,time))

 

x=int(input(“x=”))

y=int(input(“Y=”))

z=int(input(“Y=”)) 

defwork_days(x,y,z):

days=x*y*z/(x*y+y*z+z*x)

return days

print(“Work will complete(in days)”)

print(work_days(x,y,z))

 

a=int(input(“Enter First Number: “))

b=int(input(“Enter Second Number: “))

defAddition(a,b):

return a+b

def subtraction(a,b):

return a-b

def multiplication(a,b):

return a*b

def division(a,b):

return a/b

print(“Addition of {0} & {1} is : “.format(a,b))

print(Addition(a,b))

print(“subtraction of {0} & {1} is : “.format(a,b))

print(subtraction(a,b))

print(“multiplication of {0} & {1} is : “.format(a,b))

print(multiplication(a,b))

print(“division of {0} & {1} is : “.format(a,b))

print(division(a,b))

 

defvolume_sphere(r):

pi=3.1415926535897931

volume=4.0/3.0*pi* r**3

return volume

print(“volume of spheres with radius 7cm”)

print(volume_sphere(7))

print(“volume of spheres with radius 12cm”)

print(volume_sphere(12))

print(“volume of spheres with radius 16cm”)

print(volume_sphere(16))

 

fromdatetime import datetime

name = input(‘Name \n’)

age = int(input(‘Age  \n’))

defhundred_year(age):

hundred = int((100-age) + datetime.now().year)

return hundred

x=hundred_year(age)

print (‘Hello %s.  You will turn 100 years old in %s.’ % (name,x))

 

m=int(input(“Enter Mass in Kg: “))

def Einstein(m):

c=299792458

e= m*c**2

return e

print(“Equivalent energy (E): “)

print(Einstein(m))

 

import math

defheight_reched(length,degrees):

radian=math.radians(degrees)

sin=math.sin(radian)

height=round(length*sin,2)

return height 

print(” height reached by the ladder on the wall for the  length is 16 feet and 75 degrees“)

print(height_reched(16,75))

print(” height reached by the ladder on the wall for the  length is 20 feet and 0 degrees “)

print(height_reched(20,0))

print(” height reached by the ladder on the wall for the  length is 24 feet and 45 degrees“)

print(height_reched(24,45))

print(” height reached by the ladder on the wall for the  length is 24 feet and 80 degrees“)

print(height_reched(24,80))