Back to: C#.NET Programs and Algorithms
Reverse a Number and a String in C# with Examples
In this article, I am going to discuss the How to Reverse a Number and a String in C# with Examples. Please read our previous article where we discussed the Palindrome Program in C# with some examples. This is one of the most frequently asked written interview questions in C#. As part of this article, we are going to discuss the following pointers.
- How to Reverse a Given Number in C#?
- How to Reverse a Given String in C#?
How to reverse a given number in C#?
In the following C# program, we take the input number from the console and then reverse that number.
using System; namespace LogicalPrograms { public class Program { static void Main(string[] args) { Console.Write("Enter a Number : "); int number = int.Parse(Console.ReadLine()); int reminder, reverse = 0; while (number > 0) { //Get the remainder by dividing the number with 10 reminder = number % 10; //multiply the sum with 10 and then add the reminder reverse = (reverse * 10) + reminder; //Get the quotient by dividing the number with 10 number = number / 10; } Console.WriteLine($"The Reverse order is : {reverse}"); Console.ReadKey(); } } }
Output:
How to reverse a string in C#?
In the following C# program, we take the string as an input from the console. Then we reverse the string using for loop.
using System; namespace LogicalPrograms { public class Program { static void Main(string[] args) { Console.Write("Enter a String : "); string name = Console.ReadLine(); string reverse = string.Empty; for (int i = name.Length - 1; i >= 0; i--) { reverse += name[i]; } Console.WriteLine($"The Reverse string is : {reverse}"); Console.ReadKey(); } } }
Output:
Reverse a string Using Foreach loop in C#:
Let us see how to reverse a string using for each loop in C#.
using System; namespace LogicalPrograms { public class Program { static void Main(string[] args) { Console.Write("Enter a String : "); string name = Console.ReadLine(); string reverse = string.Empty; foreach (char c in name) { reverse = c + reverse; } Console.WriteLine($"The Reverse string is : {reverse}"); Console.ReadKey(); } } }
Output:
Reverse a string using Array.Reverse Method in C#:
In the following example, we take a string as an input from the console and then convert that string to a character array. Then we use the Array class Reverse method to reverse the elements of the character array. Once we reverse the elements of the character array, then we create a string from that character array.
using System; namespace LogicalPrograms { public class Program { static void Main(string[] args) { Console.Write("Enter a String : "); string name = Console.ReadLine(); char[] nameArray = name.ToCharArray(); Array.Reverse(nameArray); string reverse = new string(nameArray); Console.WriteLine($"The Reverse string is : {reverse}"); Console.ReadKey(); } } }
Output:
In the next article, I am going to discuss the Armstrong Number Program in C# with some examples. Here, in this article, I try to explain the different ways to Reverse a Number and a String in C# with examples. I hope you enjoy this Reverse a Number and a String in C# article.
Registration Open ā Full-Stack .NET with Angular & ASP.NET Core
Session Time: 8:30 PM ā 10:00 PM IST
Advance your career with our expert-led, hands-on live training program. Get complete course details, the syllabus, and Zoom credentials for demo sessions via the links below.
for reversing the number we will get wrong output if we give input number which ends with 0 example:523380 output will be 83325