source code how to calculate prime number in c#.net.With valid and correct output.
Definition Of Prime Number:- The number which is divisible by 1 and itself.
or we can say prime number is a number which has only two factor first one is 1 and second
is that number itself.
in this article i have shown to calculate prime number from one range to n range and also how to find
simple number is prime or not.
Now first to calculate whether entered number is prime number or not.
here is code:- on page init
protected void Page_init(object sender, EventArgs e)
{
int num=20, flag=0;
for (int i=2;i<;num/2++)//i will be less than half of number it will also work.
{
if(num%i==0)
{
flag=1; // now entered number 20 is divisible by 2 means 20 has another factor that is 2
so , it is not prime number no need to go in execution use break statement.
break;
}
else
{
flag=0;
}
}
if (flag==0)
{
Response.Write(" +num+"is not prime number :-");
Response.Write("</br>");
}
else
{
Response.Write( +num+"is a prime number :-");
}
}
}
It was simple program to check number is prime or not now i want to check number from n to n+...
or 1 to 20 , 1 to 100 , 1 to 1000 just enter num=100 or num=1000 as you want range.
protected void Page_init(object sender, EventArgs e)
{
int num=20, flag=0;
Response.Write("Prime Number from 2 to" +num+"is :-");
Response.Write("</br>");
for (int j=2;j<num;j++)
{
for (int i=2;i<j;i++)
{
if(j%i==0)
{
flag=1;
break;
}
else
{
flag=0;
}
}
if (flag==0)
{
Response.Write(j);
Response.Write("</br>");
}
}
}
}
Prime Number from 2 to 20 is :-
2
3
5
7
11
13
17
19
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