C#: Check a given string is an isograms or not

C# Sharp String: Exercise-51 with Solution

Write a C# Sharp program to check whether a given string is an "isograms" or not. Return True or False.

From Wikipedia,
A heterogram (from hetero-, meaning 'different', + -gram, meaning 'written') is a word, phrase, or sentence in which no letter of the alphabet occurs more than once. The terms isogram and nonpattern word have also been used to mean the same thing.

Sample Solution:-

C# Sharp Code:

using System;
using System.Linq;
using System.Collections.Generic;

namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            // Declare and initialize strings
            string str1 = "Python";
            Console.WriteLine("Original string: " + str1);

            // Check if the string is an isogram and display the result
            Console.WriteLine("Check the said string is an 'isograms' or not! " + test(str1));

            str1 = "JavaScript";
            Console.WriteLine("\nOriginal string: " + str1);
            Console.WriteLine("Check the said string is an 'isograms' or not! " + test(str1));

            str1 = "PHP";
            Console.WriteLine("\nOriginal string: " + str1);
            Console.WriteLine("Check the said string is an 'isograms' or not! " + test(str1));

            str1 = "C#";
            Console.WriteLine("\nOriginal string: " + str1);
            Console.WriteLine("Check the said string is an 'isograms' or not! " + test(str1));
        }

        // Method to check if a string is an isogram
        public static bool test(string str1)
        {
            // Get the length of the string
            int str_len = str1.Length;

            // Convert the string to lowercase, find distinct characters, and count them
            // Check if the count of distinct characters is equal to the length of the string
            return str1.ToLower().Distinct().Count() == str_len;
        }
    }
}

Sample Output:

Original string: Python
Check the said string is an 'isograms' or not! True

Original string: JavaScript
Check the said string is an 'isograms' or not! False

Original string: PHP
Check the said string is an 'isograms' or not! False

Original string: C#
Check the said string is an 'isograms' or not! True

Flowchart :

C# Sharp Code Editor:

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