How would you reverse a number

Question

// From
int target = 12345;
// To
int result = 54321;

Any answer is appreciated 👍

Answer 1

Delicate Cat

Normally I would do this but it looks amateur and I'm pretty sure the performance is awful, which is why I didn't care to show my attempt 😉

https://code.sololearn.com/cR8e68JxvGqS/?ref=app

Answer 2

https://www.c-sharpcorner.com/blogs/reverse-a-number-and-string-in-c-sharp1

Answer 3

int target = 12345;

char[] temp = target.ToString().ToCharArray();

Array.Reverse(temp);

int result = Int32.Parse(String.Join("",temp));

Console.WriteLine(result);

Answer 4

Ugh, nvm, I don't know how to reverse it the other way around

Answer 5

Andy_Roid

Thank you, Andy

Answer 6

you can do it like this,

https://code.sololearn.com/cT2K5Rz3QXc3/?ref=app

Answer 7

your method would have worked, but u need to start from the last element to first element, you can do that by using for loop.

https://code.sololearn.com/cOKUlp6xN5E6/?ref=app

Answer 8

https://code.sololearn.com/cPq5qjskrdKH/?ref=app
hope this helps u

Answer 9

//In C language

#include<stdio.h>

void main() {
int target = 12345, result = 0, r;
while(target > 0) {
r = target % 10;
result = (result * 10) + r;
target /= 10;
}
printf("%d", result);
}

Hope its easier for you convert into c#

Answer 10

Kartik Singh Negi

Very detailed and comprehensible, thanks for putting much effort into this 😉

Answer 11

Rushikesh

Thank you 😀

Answer 12

int target =12345;
int rem=0, rev=0 ,result=0;
while(target!=0)
{
rem=target%10;
rev=rev*10+rem;
target=target/10;
}

result=rev;

To reverse a number we need to get last number at first second last at second .......

In loop
//rem =5
//rev=0+5=5
//target =1234

Again
// rem=4
//rev=5*10+4=54
//target=123

Again
//rem=3
//rev=54*10+3=543
//target=12

Again
//rem=2
//rev=543*10+2=5432
//target=1

Again
//rem=1
//rev=5432*10+1=54321
//target=0

And ends because target becomes 0

Answer 13

Abirami

Thanks for the code 👍

Answer 14

We can reverse a number in C# using loop and arithmetic operators. In this program, we are getting number as input from the user and reversing that number.

Let's see a simple C# example to reverse a given number.

using System;  

  public class ReverseExample  

   {  

     public static void Main(string[] args)  

      {  

       int  n, reverse=0, rem;           

       Console.Write("Enter a number: ");      

       n= int.Parse(Console.ReadLine());     

       while(n!=0)      

       {      

        rem=n%10;        

        reverse=reverse*10+rem;      

        n/=10;      

       }      

       Console.Write("Reversed Number: "+reverse);       

    }  

  }