num_list=[] n=int(input("Enter the Starting of the range:")) k=int(input("Enter the Ending of the range:")) for i in range(n,k): num_list.append(i) print("Original Number List:", num_list) even_list=[] odd_list=[] for i in range(len(num_list)): if(num_list[i]%2==0): even_list.append(num_list[i]) else: odd_list.append(num_list[i]) print("Even Numbers List:", even_list) print("Odd Numbers List:", odd_list)
Output:
In this tutorial, you will learn to write a program that will print all the even numbers in a list. Even numbers are the numbers that are divisible by 2. We will use this property of even numbers in our program. The concept of loops in Python and conditional statements in Python will be used in our program. For a given list of numbers, the task is to find and print all the even numbers in the list. Input: [7, 4, 9, 3, 5, 1, 2, 12] Output: [4, 2, 12] Input: [13, 17, 9, 8, 15, 29] Output: [8] To execute this program we will follow the approach of traversing the list and checking each element if it is an even number or not. If it is an even number, print the number or add it to another list and print this list as output. Follow the algorithm to understand the approach better. Step 1- Define a function that will check for all even numbers in a list Step 2- Declare a list that will store all the even numbers in a listApproach to print even numbers in a list
Algorithm
Step 3- Run a loop for all elements in the list
Step 4- Check if the element is divisible by 2 or not
Step 5- If yes, then add the number to the new list
Step 6- Return new list as the output of the function
Step 7- Take input of a list using loop
Step 8- Call the function and print the result
Python Program
Look at the program to understand the implementation of the above-mentioned approach. We have used the append() function to add an element to a list. It is a built-in function.
#even numbers in list #function def even(list): new_list=[] for i in list: if i%2==0: new_list.append(i) return new_list #input li=[] n=int(input("Enter size of list ")) for i in range(0,n): e=int(input("Enter element of list ")) li.append(e) print("Even numbers in ",li) print(even(li))Enter size of list 5 Enter element of list 3 Enter element of list 6 Enter element of list 1 Enter element of list 2 Enter element of list 9 Even numbers in [3, 6, 1, 2, 9]
[6, 2]
Conclusion
In this tutorial, we have learned how to find and print all the even numbers in a list. We can do the above-mentioned program in a more simple way by just printing the element which satisfies the if condition. Then we will not need to declare a new list and add the even numbers in that list.
In this post, you will learn different ways to write Python programs to list even and odd numbers in a list. To check whether a number is odd or even, you can either ask the user to enter a number or you can provide a list from which the program can check whether the number is odd or even. Such type of program is generally asked during interviews and in the examination. This can also be helpful to improve our programming skills. In the given example, we are using the for loop to list the even and odd items in the list. In each iteration of the list, we apply the condition to check the even numbers, i.e., to check their remainder after dividing by 2. If the remainder is 0 (i% 2 == 0), add it to the even list; otherwise, add it to the odd list.Print even and odd in the list using the for loop
Find even and odd in list using lambda function
A lambda function is a small anonymous function that takes any number of arguments, but can only have one expression. It is useful when writing a function inside a function. In the given example, we have easily found the even and odd numbers in the list using a lambda function. The argument and the function are surrounded by parentheses.
# Check and count odd and even numbers using lambda function # list of numbers numberlist = [11, 30, 28, 41, 22, 85, 7] # print Even numbers in a list using Lambda function even_numbers = list(filter(lambda x: x % 2 == 0,numberlist)) print("Total Even numbers in the list: ", even_numbers) # print Odd numbers in a list using Lambda function odd_numbers = list(filter(lambda x: x % 2 == 1,numberlist)) print("Total Odd numbers in the list: ", odd_numbers) Output of the above code - Total Even numbers in the list: [30, 28, 22] Total Odd numbers in the list: [11, 41, 85, 7]Find even and odd in the list using while loop
This Python program for listing the even and odd numbers is the same as the above. We just replace the for loop with a while loop.
# Check and count odd and even numbers using while loop # list of numbers numlist = [11, 30, 28, 41, 22, 85, 7] even_count = [] odd_count = [] num = 0 # using while loop while(num < len(numlist)): # checking condition if numlist[num] % 2 == 0: even_count.append(numlist[num]) else: odd_count.append(numlist[num]) # increment num num += 1 print("Even numbers in the list: ", even_count) print("Odd numbers in the list: ", odd_count) Output of the above code - Even numbers in the list: [30, 28, 22] Odd numbers in the list: [11, 41, 85, 7]Find even and odd using function
Here is the Python program for listing the even and odd numbers from the specified range.
def find_even_odd(numbers): odd_numbers = [number for number in numbers if number % 2 == 1] even_numbers = [number for number in numbers if number % 2 == 0] return odd_numbers, even_numbers numbers = range(1,40) print("The odd numbers are {}".format(find_even_odd(numbers)[0])) print("The even numbers are {}".format(find_even_odd(numbers)[1])) Output of the above code: The odd numbers are [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39] The even numbers are [2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38]Related Articles
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