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armstrong number

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Wild Whale answered on November 2, 2020 Popularity 10/10 Helpfulness 3/10

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armstrong number

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sum of cubes of the digits

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Contributed on Nov 02 2020

Wild Whale

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armstrong number

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from math import log10

def is_armstrong(num):
    """
    This function checks if num is an Armstrong number.
    Note that an Armstrong number is a n-digit number 
    that is equal to the sum of each of its digits 
    raised to the nth power.

    For example:  1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 
    371, 407, and 1634 are all Armstrong numbers

    Time complexity: O(n^2)
    Space complexity: O(1)
    """
    if num < 0:
        return False
    if num == 0:
        return True
    n = int(log10(num)) + 1
    sum = 0
    temp = num
    while temp > 0:
        last_digit = temp % 10
        sum += last_digit ** n
        temp //= 10
    return num == sum

print(is_armstrong(3))  # True
print(is_armstrong(120))  # False
print(is_armstrong(153))  # True
print(is_armstrong(1600))  # False
print(is_armstrong(1634))  # True

Popularity 9/10 Helpfulness 4/10 Language python

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Tags: numeric

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Contributed on Aug 24 2022

Wissam

0 Answers Avg Quality 2/10

armstrong numbers

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// Armstrong Numbers
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 371, 407, 1634, 8208, 9474, 54748...

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Contributed on Jun 13 2021

Eye Candy

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armstrong number

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// ARMSTRONG NUMBER
// 153

let sum = 0;
const number = 153;
// create a temporary variable
let temp = number;
while (temp > 0) {
  // finding the one's digit
  let remainder = temp % 10;

  sum += remainder * remainder * remainder;

  // removing last digit from the number
  temp = parseInt(temp / 10); // convert float into integer
}
// check the condition
if (sum == number) {
  console.log(`${number} is an Armstrong number`);
} else {
  console.log(`${number} is not an Armstrong number.`);
}

Popularity 8/10 Helpfulness 2/10 Language javascript

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Contributed on Feb 06 2022

Abhishek

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Armstrong number

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// C++ Program to find
// Nth Armstrong Number
#include <bits/stdc++.h>
#include <math.h>
using namespace std;
 
// Function to find Nth Armstrong Number
int NthArmstrong(int n)
{
    int count = 0;
 
    // upper limit from integer
    for (int i = 1; i <= INT_MAX; i++) {
        int num = i, rem, digit = 0, sum = 0;
 
        // Copy the value for num in num
        num = i;
 
        // Find total digits in num
        digit = (int)log10(num) + 1;
 
        // Calculate sum of power of digits
        while (num > 0) {
            rem = num % 10;
            sum = sum + pow(rem, digit);
            num = num / 10;
        }
        // Check for Armstrong number
        if (i == sum)
            count++;
        if (count == n)
            return i;
    }
}
 
// Driver Function
int main()
{
    int n = 12;
    cout << NthArmstrong(n);
    return 0;
}
 
// This Code is Contributed by 'jaingyayak'

Popularity 7/10 Helpfulness 1/10 Language cpp

Source: www.geeksforgeeks.org

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Contributed on Jun 17 2022

Anonymous

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armstrong number function

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-2

def is_armstrong_number(number: int)-> bool:
    arm = str(number)
    lenght = len(arm)
    sum = 0
    for digit in arm:
        sum += int(digit)**lenght
    return sum == number

Popularity 9/10 Helpfulness 1/10 Language python

Source: exercism.io

Tags: function functio

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Contributed on Jun 01 2021

Precious Parrot

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