求1-100之间的质数 分别用for while do-while三种语句，C#

在C#中，求1-100之间的质数可以使用For、While和Do-While循环分别编写如下：

**使用For循环：**

using System;

public class PrimeNumbers
{
    static void Main()
    {
        int limit = 100;
        for (int i = 2; i <= limit; i++)
        {
            if (IsPrime(i))
            {
                Console.Write(i + " ");
            }
        }
    }

    static bool IsPrime(int number)
    {
        if (number < 2) return false;
        for (int j = 2; j * j <= number; j++)
        {
            if (number % j == 0)
            {
                return false;
            }
        }
        return true;
    }
}

**使用While循环：**

using System;

public class PrimeNumbers
{
    static void Main()
    {
        int i = 2, limit = 100;
        while (i <= limit)
        {
            if (IsPrime(i))
            {
                Console.Write(i + " ");
            }
            i++;
        }
    }

    static bool IsPrime(int number)
    {
        if (number < 2) return false;
        for (int j = 2; j * j <= number; j++)
        {
            if (number % j == 0)
            {
                return false;
            }
        }
        return true;
    }
}

**使用Do-While循环：**

using System;

public class PrimeNumbers
{
    static void Main()
    {
        int i = 2, limit = 100;
        do
        {
            if (IsPrime(i))
            {
                Console.Write(i + " ");
            }
            i++;
        } while (i <= limit);
    }

    static bool IsPrime(int number)
    {
        if (number < 2) return false;
        for (int j = 2; j * j <= number; j++)
        {
            if (number % j == 0)
            {
                return false;
            }
        }
        return true;
    }
}