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Question about the task

Sum of the digits of a three-digit number

Under discussion

Write the code for sumDigitsInNumber(int number). The method takes a three-digit whole number. You need to calculate the sum of the digits of this number, and then return the result.

Consider this example:
The sumDigitsInNumber method is called with the argument 546.

Example output:
15

Requirements:

The program must not read data from the keyboard.
The sumDigitsInNumber(int) method must be public and static.
The sumDigitsInNumber method must return an int.
The sumDigitsInNumber method should not display anything.
The sumDigitsInNumber method must return the sum of all digits in the parameter number.

package com.codegym.task.task01.task0132; /* Sum of the digits of a three-digit number */ public class Solution { public static void main(String[] args) { System.out.println(sumDigitsInNumber(546)); } public static int sumDigitsInNumber(int number) { //write your code here return number/3; } }

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ron_villela

Level 9 , Miami, United States

25 July 2021, 04:57

useful

separate the numbers with modulus then add...

DavidJugaad

Level 10

19 July 2021, 15:36

useful

Dear Nnamdi, Divide and Conquer. Use divison (ratio and module) For a given number xyz, divide: xyz/100 and you will get 1st digit (x) Use the mod of the former operation to divide it again by 10 and you will get 2nd digit. (y) The mod of the former operation, will give you the third digit. (z) return x+y+z Tip: mod operator: % Stay safe, All the best Hope it helps...

Jomar Tayactac

Level 2 , Winnipeg, Canada

Expert

19 July 2021, 14:57

useful

There are different ways to solve this task. One way to solve it, which is the way I did it, is to convert the argument into a character array. Once that is done, you can then get the numerical value of each element in the character array and add them all together. That should give you the sum of all digits. Hope this helps.

Thomas

Level 31 , Bayreuth, Germany

30 June 2021, 13:06

useful

the task asks you to take the number (here eg. 546) and to split it up in single digits like 5 and 4 and 6 and finally you should add up these values (5 + 4 + 6) so you finally get the result 15 (cross sum).