C#: Check whether a given integer is a palindrome integer or not

Last update on December 20 2024 12:51:53 (UTC/GMT +8 hours)

Write a C# Sharp program to check whether a given integer is a palindrome integer or not. Return true if the number is a palindrome, otherwise return false.

A palindromic number (also known as a numeral palindrome or a numeric palindrome) is a number (such as 16461) that remains the same when its digits are reversed. In other words, it has reflectional symmetry across a vertical axis. The term palindromic is derived from palindrome, which refers to a word (such as rotor or racecar) whose spelling is unchanged when its letters are reversed. The first 30 palindromic numbers (in decimal) are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, …

Sample Solution:

C# Sharp Code:

using System;
namespace exercises {
  class Program {
    static void Main(string[] args) {
      int n;
      n = 123456;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Check the said number is a palindrome number or not:");
      Console.WriteLine(test_is_Palindrome(n));
      n = 16461;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Check the said number is a palindrome number or not:");
      Console.WriteLine(test_is_Palindrome(n));
      n = -121;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Check the said number is a palindrome number or not:");
      Console.WriteLine(test_is_Palindrome(n));
      }
        public static bool test_is_Palindrome(int a)
        {
            if (a < 0) { return false; }
            if (a < 10) { return true; }

            var temp = a;
            var b = 0;
            var digit = 0;
            while (temp != 0)
            {
                digit = temp % 10;
                b = b * 10 + digit;
                temp /= 10;
            }
            return a == b;
        }
    }
  }

Sample Output:

Original integer value: 123456
Check the said number is a palindrome number or not:
False
Original integer value: 16461
Check the said number is a palindrome number or not:
True
Original integer value: -121
Check the said number is a palindrome number or not:
False

Flowchart:

C# Sharp Code Editor:

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