Solved Examples
Question 1
Write a program that accepts a list from user. Your program should multiply the odd elements by 3 and divide the even elements by 2 and display the list.
Program
number = []
size = int(input('How many elements you want to enter? '))
print('Enter',str(size),'numbers')
for i in range(size):
data = int(input())
number.append(data)
print(number)
for i in range(size):
if number[i]%2 == 0:
number[i] = number[i] / 2
else:
number[i] = number[i] * 3
print(number)Output
How many elements you want to enter? 5 Enter 5 numbers 10 14 23 35 90 [10, 14, 23, 35, 90] [5.0, 7.0, 69, 105, 45.0]
Question 2
Write a program that counts number of words in a sentence.
Program
text = input('Enter a string: ')
#converting string to list of words
words = text.split()
#length of list
count = len(words)
#display number of words
print('No of words are',str(count))Output
Enter a string: Work hard to achieve your goal No of words are 6
Question 3
A matrix is the rectangular array of numbers. Write a program to input and display a matrix of size m x n, where m is the number of rows and n is the number of columns of the matrix.
For example matrix of size 3 x 4 should display like this:
Program
row = int(input("Enter the number of rows:"))
col = int(input("Enter the number of columns:"))
matrix = []
print("Enter values in matrix :")
# For user input
for i in range(row):
data =[]
for j in range(col):
data.append(int(input()))
matrix.append(data)
# For printing the matrix
for i in range(row):
for j in range(col):
print(matrix[i][j], end = " ")
print()
Output
Enter the number of rows:3 Enter the number of columns:4 Enter values in matrix : 2 11 7 12 5 2 9 15 8 3 10 42 2 11 7 12 5 2 9 15 8 3 10 42