Python: Check whether a distinct pair of numbers whose product is odd present in a sequence of integer values
Python Basic: Exercise-150 with Solution
Write a Python function to check whether a distinct pair of numbers whose product is odd is present in a sequence of integer values.
Sample Solution:
Python Code :
# Define a function named 'odd_product' that takes a list 'nums' as its argument.
def odd_product(nums):
# Iterate through the indices of the 'nums' list using nested loops.
for i in range(len(nums)):
for j in range(len(nums)):
# Check if 'i' and 'j' are different indices to avoid multiplying the same number.
if i != j:
# Calculate the product of elements at indices 'i' and 'j'.
product = nums[i] * nums[j]
# Check if the product is an odd number (using bitwise AND with 1).
if product & 1:
# If an odd product is found, return True immediately.
return True
# If no odd product is found, return False.
return False
# Define three lists of integers.
dt1 = [2, 4, 6, 8]
dt2 = [1, 6, 4, 7, 8]
dt3 = [1, 3, 5, 7, 9]
# Call the 'odd_product' function for each list and print the result.
print(dt1, odd_product(dt1))
print(dt2, odd_product(dt2))
print(dt3, odd_product(dt3))
Sample Output:
[2, 4, 6, 8] False [1, 6, 4, 7, 8] True [1, 3, 5, 7, 9] True
Pictorial Presentation of the sequence [2, 4, 6, 8]:
Pictorial Presentation of the sequence [1, 6, 4, 7, 8]:
Flowchart:
Sample Solution:
Distinct pair of numbers whose product is odd present in a given sequence:
Python Code :
# Import the itertools module to work with combinations of numbers.
import itertools
# Define a function named 'pair_nums_odd' that takes a list 'nums' as its argument.
def pair_nums_odd(nums):
# Create a set of unique numbers from the input list.
uniquelist = set(nums)
# Initialize an empty list 'result' to store pairs whose product is odd.
result = []
# Iterate through all distinct pairs of numbers from 'uniquelist'.
for n in itertools.combinations(uniquelist, 2):
# Check if the product of the pair is an odd number.
if ((n[0] * n[1]) % 2 == 1):
# Create a string representation of the pair.
temp = str(n[0]) + " * " + str(n[1])
# Append the string to the 'result' list.
result.append(temp)
# Return the list of distinct pairs with odd products.
return result
# Define three lists of integers.
dt1 = [2, 4, 6, 8]
dt2 = [1, 6, 4, 7, 8]
dt3 = [1, 3, 5, 7, 9]
# Print the original sequence and the distinct pairs with odd products for each list.
print("Original sequence:")
print(dt1)
print("Distinct pair of numbers whose product is odd present in the said sequence:")
print(pair_nums_odd(dt1))
print("\nOriginal sequence:")
print(dt2)
print("Distinct pair of numbers whose product is odd present in the said sequence:")
print(pair_nums_odd(dt2))
print("\nOriginal sequence:")
print(dt3)
print("Distinct pair of numbers whose product is odd present in the said sequence:")
print(pair_nums_odd(dt3))
Sample Output:
Original sequence: [2, 4, 6, 8] Distinct pair of numbers whose product is odd present in the said sequence: [] Original sequence: [1, 6, 4, 7, 8] Distinct pair of numbers whose product is odd present in the said sequence: ['1 * 7'] Original sequence: [1, 3, 5, 7, 9] Distinct pair of numbers whose product is odd present in the said sequence: ['1 * 3', '1 * 5', '1 * 7', '1 * 9', '3 * 5', '3 * 7', '3 * 9', '5 * 7', '5 * 9', '7 * 9']
Pictorial Presentation of the sequence [1, 3, 5, 7, 9]:
Flowchart:
Python Code Editor :
Previous: Write a Python function that takes a positive integer and returns the sum of the cube of all the positive integers smaller than the specified number.
Next: Basic - Part-II.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.
https://www.w3resource.com/python-exercises/python-basic-exercise-150.php
- Weekly Trends and Language Statistics
- Weekly Trends and Language Statistics