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Programming Articles
Page 1762 of 2547
How to round down to 2 decimals a float using Python?
In this article, we will show you how to round off a floating number upto 2 decimals in python. Below are the various methods to accomplish this task: Using round() function Using format() function Using Decimal Module Using ceil() function Using round() function The round() function gives a floating point number with a specified number of decimals which is the rounded version of the specified number. The function will return the nearest integer because the default value for the number of decimals is 0. Syntax round(number, digits) Parameters number(required)- a number that should be rounded digits(optional)- ...
Read MoreHow to index and slice a tuple in Python?
A tuple is an ordered and immutable collection of Python objects separated by commas. Like lists, tuples are sequences. Tuples differ from lists in that they can't be modified, whereas lists can, and they use parentheses instead of square brackets. tup=('tutorials', 'point', 2022, True) print(tup) If you execute the above snippet, produces the following output − ('tutorials', 'point', 2022, True) In this article, we will discuss how to index and slice tuples in python. Indexing Tuples In Python, every tuple with elements has a position or index. Each element of the tuple can be accessed or manipulated by ...
Read MoreOdd numbers in N-th row of Pascal’s Triangle
The problem statement includes counting the odd numbers in N−th row of Pascal’s triangle. A pascal’s triangle is a triangular array where each row represents the binomial coefficients in the expansion of binomial expression. The Pascal’s triangle is demonstrated as below: 1 1 ...
Read MoreMoser-de Bruijn Sequence
The problem statement includes printing the first N terms of the Moser−de Bruijn Sequence where N will be given in the user input. The Moser−de Bruijn sequence is a sequence consisting of integers which are nothing but the sum of the different powers of 4 i.e. 1, 4, 16, 64 and so on. The first few numbers of the sequence include 0, 1, 4, 5, 16, 17, 20, 21, 64....... The sequence always starts with zero followed by the sum of different powers of 4 such as $\mathrm{4^{0}}$ i.e $\mathrm{4^{1}\:i.e\:4, }$ then sum of $\mathrm{4^{0}\:and\:4^{1}\:i.e\:5}$ and so on. In this ...
Read MoreFrequency Measuring Techniques for Competitive Programming
In this article, we are going to find the different ways to find the frequency of numbers present in an array []. These methods are very useful in doing competitive programming for different problems for different cases. Sometimes, calculating the frequency of elements whether it is numbers or alphabets presented in the array is a complicated task. Various algorithms like Searching, array, divide and conquer can be used to find the repeated elements defined in the array. Note- Take an integer array. Let's explore the article, to know how it can be solved by using Java programming ...
Read MoreVantieghems Theorem for Primality Test
The problem statement includes using Vantieghems theorem for primality test i.e. we will check for a positive number N which will be user input and print if the number is a prime number or not using the Vantieghems theorem. Vantieghem’s Theorem The Vantieghems theorem for primality states that a positive number, N is a prime number if the product of $\mathrm{2^{i}−1}$ where the value of i ranges from 1 to N−1 is congruent to N modulo $\mathrm{2^{N}−1}$ If both the values are congruent then the number N is a prime number else it is not a prime number. Congruent ...
Read MoreSum of Range in a Series of First Odd then Even Natural Numbers
The problem statement includes finding the sum of range in a series of first odd numbers then even natural numbers up to N. The sequence consists of all the odd natural numbers from 1 to N and then all the even natural numbers from 2 to N, including N. The sequence will be of size N. We will be provided with a range in the problem for which we need to find out the sum of the sequence within that range, a and b i.e. [a, b]. Here a and b are included in the range. For example, we are ...
Read MoreSum of product of Consecutive Binomial Coefficients
The problem statement includes printing the sum of product of consecutive binomial coefficients for any positive number, N which will be the user input. The positive coefficients in the binomial expansion of any term are called binomial coefficients. These binomial coefficients can be found out using Pascal's triangle or a direct formula. The formula to calculate the binomial coefficient: $$\mathrm{^nC_{r}=\frac{n!}{(n-r)!r!}}$$ where, n and r can be any positive numbers and r should never be greater than n. Note : The value of 0! is always equal to 1. In this problem, we will be given a positive number N and ...
Read MoreSum of digits written in different bases from 2 to n-1
The problem statement includes printing the sum of digits of N, which will be the user input, when written in different bases from 2 to N−1. In this problem, we will be provided any positive integer N and we need to represent that number in a different base numeral system from 2 to N−1 and find the sum of the digit of each different base numeral system. In the base−n numeral system, every digit of the representation of any number in that numeral system from right represents the number of times power of n from 0 to 31. For example, ...
Read MoreProgram to print the sum of the given nth term
The problem statement includes printing the sum of the series whose Nth term is given. The value of N will be given in the input. We need to find the sum of the sequence up to N where the Nth term of the sequence is given by: $$\mathrm{N^{2}−(N−1)^{2}}$$ Let’s understand the problem with the below examples: Input N=5 Output 25 Explanation − The value of N given is 5.The first 5 terms of the sequence are: $\mathrm{N=1, 1^{2}−(1−1)^{2}=1}$ $\mathrm{N=2, 2^{2}−(2−1)^{2}=3}$ $\mathrm{N=3, 3^{2}−(3−1)^{2}=5}$ $\mathrm{N=4, 4^{2}−(4−1)^{2}=7}$ $\mathrm{N=5, 5^{2}−(5−1)^{2}=9}$ The sum of the terms of the sequence until 5th ...
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