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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