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Page 282 of 2109
Python program to print decimal octal hex and binary of first n numbers
Sometimes we need to display numbers in different formats: decimal, octal, hexadecimal, and binary. Python provides format specifiers to convert numbers into these representations with proper alignment. So, if the input is like n = 10, then the output will be ? 1 1 1 1 2 2 2 10 3 3 3 11 4 4 4 100 5 5 5 101 6 6 ...
Read MorePython program to print design door mat texture using characters
A door mat pattern is a decorative text design that creates a symmetric mat-like structure. In this pattern, we use hyphens (-), dots (.), and pipe symbols (|) to create a design with "WELCOME" in the center. The mat has dimensions n × m, where m is a multiple of n. Understanding the Pattern The door mat follows this structure: Top half: Expanding pattern from 1 to n-1 (odd numbers only) Middle: "WELCOME" text surrounded by hyphens Bottom half: Mirror of the top half in reverse order Each row contains: Left padding of ...
Read MorePython program to wrap a text into paragraph with width w
Text wrapping is a common task when formatting output for display or printing. Python's textwrap module provides the fill() function to wrap text into paragraphs with a specified width. Syntax textwrap.fill(text, width=70, **kwargs) Parameters The fill() function accepts the following parameters: text − The string to be wrapped width − Maximum line width (default is 70) break_long_words − Break words longer than width (default True) break_on_hyphens − Break on hyphens (default True) Basic Text Wrapping Let's wrap a text string with width 9 ? import textwrap ...
Read MorePython program to show diamond pattern with 2n-1 lines
A diamond pattern is a symmetric arrangement of asterisks that expands from one star to n stars, then contracts back to one star. The pattern consists of 2n-1 lines total, with the widest part containing n asterisks. Understanding the Pattern For n = 5, the diamond pattern looks like ? * * * * * * * * * * * * * * * * * * * * * * * * * ...
Read MorePython program to validate string has few selected type of characters or not
When working with strings in Python, you may need to validate whether a string contains specific types of characters. This article demonstrates how to check if a string contains numbers, lowercase letters, and uppercase letters. Problem Statement Given a string, we need to check whether it contains all three of the following character types ? Numbers (digits) Lowercase letters Uppercase letters Note: The string may contain other symbols, but all three character types above must be present. For example, if the input string is "p25KDs", the output should be True because it contains ...
Read MorePython Program to calculate function from indicator random variable from given condition
This problem involves calculating the expected value of a function from indicator random variables based on local extrema in random permutations. Given values k and n, we work with a random permutation of first n natural numbers and calculate F = (X₂+...+Xₙ₋₁)ᵏ, where Xᵢ is 1 when pᵢ₋₁ < pᵢ > pᵢ₊₁ or pᵢ₋₁ > pᵢ < pᵢ₊₁ (local maximum or minimum), and 0 otherwise. Understanding the Problem The indicator random variable Xᵢ equals 1 when position i is a local extremum (peak or valley) in the permutation. The expected value calculation uses precomputed formulas for different values ...
Read MorePython program to change character of a string using given index
Strings in Python are immutable, meaning you cannot modify individual characters directly. When you need to change a character at a specific index, you must create a new string using slicing and concatenation. For example, if we have s = "python", i = 3, and c = 'P', attempting s[i] = c will raise a TypeError: 'str' object does not support item assignment. Algorithm To replace a character at index i with character c ? Extract the left part: s[0:i] Extract the right part: s[i+1:] Concatenate: left + c + right Using String ...
Read MorePython program to split a string and join with comma
Sometimes we need to split a string into individual words and then join them back together with commas instead of spaces. Python provides simple built-in methods to accomplish this task efficiently. So, if the input is like s = "Programming Python Language Easy Funny", then the output will be Programming, Python, Language, Easy, Funny Algorithm To solve this, we will follow these steps − words − Create a list of words by applying split() function on the string with delimiter " " (space) result − Join each ...
Read MorePython program to find hash from a given tuple
The hash() function in Python computes a hash value for hashable objects like tuples. Hash values are integers used internally by Python for dictionary keys and set membership tests. Tuples are hashable because they are immutable, unlike lists which cannot be hashed due to their mutable nature. Syntax hash(object) Where object must be a hashable type (int, float, string, tuple, etc.). Example Let's find the hash value of a tuple containing integers − def solve(t): return hash(t) t = (2, 4, 5, 6, 7, 8) result ...
Read MorePython program to sort and reverse a given list
When working with lists in Python, you often need to sort or reverse them without modifying the original list. Python provides sorted() and reversed() functions that return new objects, unlike sort() and reverse() which modify the list in-place. Problem Statement Given a list of numbers, create a reversed version and a sorted version without changing the original list. Example Input and Output If the input is l = [2, 5, 8, 6, 3, 4, 7, 9], the output should be ? Reversed: [9, 7, 4, 3, 6, 8, 5, 2] Sorted: [2, 3, 4, ...
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