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Technical articles with clear explanations and examples
Python program to print even numbers in a list
Python lists are fundamental data structures that store collections of items. Finding even numbers in a list is a common programming task with multiple efficient approaches. A number is even if it divides by 2 with no remainder. We will explore several methods to print even numbers from a list, each with different advantages ? Using Modulo Operator The modulo operator (%) returns the remainder when dividing two numbers. For even numbers, x % 2 == 0 will be true. Example def print_evens(numbers): for num in numbers: ...
Read MorePython program to print even length words in a string
In Python, you can find and print all words in a string that have even length (divisible by 2). This is useful for text processing tasks where you need to filter words based on their character count. For example, in the string "A big cube was found inside the box", the words "cube" (length 4) and "inside" (length 6) have even lengths. Basic Approach The simplest method involves splitting the string into words and checking each word's length ? def print_even_length_words(text): # Split the string into individual words ...
Read MorePython program to find the most occurring character and its count
In this article, we will learn how to find the most occurring character in a string and count its occurrences using Python's Counter class. Problem Statement Given an input string, we need to find the character that appears most frequently and return both the character and its count. Approach Create a dictionary using Counter method having characters as keys and their frequencies as values. Find the maximum occurrence count and get the corresponding character. Using Counter from collections The Counter class provides an easy way to count character frequencies ? ...
Read MorePython program to find the highest 3 values in a dictionary
In this article, we will learn how to find the highest 3 values in a dictionary using different Python approaches. Problem Statement Given a dictionary, we need to find the three highest values and display them along with their corresponding keys. Using collections.Counter The Counter class provides a most_common() method that returns the n most common elements and their counts ? from collections import Counter # Initial Dictionary my_dict = {'a': 3, 'b': 4, 'c': 6, 'd': 5, 'e': 21} counter = Counter(my_dict) # Finding 3 highest values highest = counter.most_common(3) ...
Read MorePython Program to find the sum of array
In this article, we will learn different approaches to find the sum of all elements in an array. Python provides both manual iteration and built-in functions to accomplish this task. Problem Statement Given an array as input, we need to compute the sum of all elements in the array. We can solve this using manual iteration or Python's built-in sum() function. Method 1: Using Built-in sum() Function The simplest approach uses Python's built-in sum() function − # Using built-in sum() function arr = [1, 2, 3, 4, 5] result = sum(arr) print('Sum of the ...
Read MorePython program to find sum of absolute difference between all pairs in a list
In this article, we will learn how to find the sum of absolute differences between all pairs in a list. This involves calculating |a - b| for every pair of elements and summing the results. Problem Statement Given a list of numbers, we need to find the sum of absolute differences between all unique pairs. For example, with list [1, 3, 5], we calculate |1-3| + |1-5| + |3-5| = 2 + 4 + 2 = 8. Method 1: Using Nested Loops We can use two nested loops to iterate through all pairs and calculate their ...
Read MorePython program to find largest number in a list
Finding the largest number in a list is a fundamental programming task in Python. There are several efficient approaches to accomplish this, each with different advantages depending on your specific needs. Problem Statement Given a list of numbers, we need to find the largest element efficiently. We'll explore three different approaches to solve this problem. Using Built-in max() Function The most straightforward and efficient approach is using Python's built-in max() function ? numbers = [18, 65, 78, 89, 90, 45, 23] largest = max(numbers) print("Largest element is:", largest) Largest element ...
Read MorePython program to convert decimal to binary number
Converting decimal numbers to binary is a fundamental programming task. Python provides both manual and built-in approaches to achieve this conversion. Problem Statement Given a decimal number, we need to convert it into its binary representation. Using Recursive Approach The recursive method divides the number by 2 repeatedly and prints the remainders in reverse order − Algorithm DecToBin(num): if num > 1: DecToBin(num // 2) print num % 2 Example def DecimalToBinary(num): ...
Read MorePython Program to check whether it is possible to make a divisible by 3 number using all digits in an array
In this article, we will learn how to check whether it's possible to make a number divisible by 3 using all digits from an array of integers. Problem Statement Given an array of integers, we need to determine if we can form a number using all the digits from these integers such that the resulting number would be divisible by 3. Mathematical Concept This solution is based on a fundamental property from number theory: a number is divisible by 3 if and only if the sum of its digits is divisible by 3. This means we ...
Read MorePython program to check if the given string is pangram
In this article, we will learn how to check if a given string is a pangram using Python. A pangram is a sentence that contains every letter of the English alphabet at least once. What is a Pangram? A pangram is a sentence or series of words that uses every letter in the English alphabet collection. Famous examples include "The quick brown fox jumps over the lazy dog" and "Pack my box with five dozen liquor jugs". Method 1: Using Manual Alphabet Check We can check each letter of the alphabet to see if it exists ...
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