C# program to print all prime numbers between 1 to 100 using for loop

In this tutorial, we will discuss the concept of the C# program to print all prime numbers between 1 to 100 using for loop

In this post, we will learn how to print all prime numbers between 1 to 100 using for loop in C# programming language with Example program.

Prime number

The number that can be divided by 1 and itself. it is called a prime number

for Example 2,3,5,7,11,13…

Print prime numbers between 1 to 100 using for loop

Print Prime numbers 1 to 100- method 1

In this program, the user declares and initializes variables then it will print prime numbers from 1 to 100, using the for loop in the C# language.

Program 1

//print prime numbers between 1 to 100 using for loop
using System;
namespace primeNumber
{
    class first1toNPrime
    {
        static void Main(string[]args)
        {
        Console.WriteLine("print prime number between 1 to 100");
        bool isPrime=true;
        for(var i=2; i<=100; i++){
            
            for(var j=2; j<=100; j++)
            {
            if(i!=j && i%j==0){
                    isPrime=false;
                break;
            }
        }
            if(isPrime){
                Console.Write(i+",");
        }
        isPrime=true;
        
    }
    Console.ReadKey();
}
}
}

When the above code is executed, it produces the following result

print prime number between 1 to 100
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,

Print Prime numbers 1 to 100- method 2

In this program, the user declares and initializes variables then it will print prime numbers from 1 to 100, using the for loop in the C# language.

Program 2

//C# program to print all prime numbers between 1 to 100 using for loop
using System;
namespace primeNumber
{
    class first_N_Prime
    {
        static void Main(string[]args)
        {
            int i=1,count=0;
        Console.WriteLine("Prime numbers between 1 to 100 ");
    
        
        for(int n=0; n<100; n++){
        
        count=0;
        for(int j=1; j<=i; 	j++){
            if(i%j==0)
                    count++;
                
        }
            if(count==2){
                Console.Write(i+",");
                
        }
        i++;
    }
}
}
}

When the above code is executed, it produces the following result

Prime numbers between 1 to 100
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,

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C# program to print all prime numbers between 1 to 100 using for loop

C# program to print all prime numbers between 1 to 100 using for loop