Page 201 - Computer Science V2.0 Class 11

num1, num2 = swap(num1,num2)

print('Numbers after swap',num1,num2)
16. Write a program to repeat the string ‘‘GOOD MORNING” n times. Here ‘n’ is an integer entered by the user.
Ans. def stringRepeat(myStr, num):
return myStr * num

myStr = 'GOOD MORNING'
num = int(input('Enter Number of times string to be repeated: '))

print('String repeated', num, 'times is:')
print(stringRepeat(myStr, num))
17. Write a program to find average of three numbers.
Ans. def average(num1,num2,num3):
avg = (num1 + num2 + num3) / 3
return avg

num1 = int(input("Enter First Number: "))
num2 = int(input("Enter Second Number: "))
num3 = int(input("Enter Third Number: "))
print("Average=",average(num1,num2,num3))
18. The volume of a sphere with radius r is 4/3π. Write a Python program to find the volume of spheres with radius 7cm, 12cm, 16cm,
respectively.
Ans. import math

def sphereVolume(radius):
volume = (4/3) * math.pi * radius**3
return volume

print(f"volume of sphere with radius 7cm: {sphereVolume(7):.2f}")
print(f"volume of sphere with radius 12cm: {sphereVolume(12):.2f}")
print(f"volume of sphere with radius 16cm: {sphereVolume(16):.2f}")
19. Write a program that asks the user to enter their name and age. Print a message addressed to the user that tells the user the year in
which they will turn 100 years old.
Ans. from datetime import datetime

def hundredYear(age):
year100 = int((100 - age) + datetime.now().year)
return year100

name = input('Enter Your Name:')
age = int(input('Enter your Age:'))

print ('Hello %s.You will turn 100 years old in %s.' % (name,hundredYear(age)))
20. The formula E = mc2 states that the equivalent energy (E) can be calculated as the mass (m) multiplied by the speed of light (c = about
3×108 m/s) squared. Write a program that accepts the mass of an object and determines its energy.
Ans. def computeEnergy(mass):
c = 3 * 10 ** 8
return (mass) * c ** 2

Data Types and Operators 187