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…
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,
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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