// Print Prime number series.
class prime
{
void main ()
{
int i = 1;
int C = 0;
int n = 1;
int X = 0;
while (X != 1000)
{
if ( n % i n )
{
C = 0;
n++ ;
i = 0;
}
}
i++ ;
}
}
}
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#include <iostream.h> main() { int a; cout<<"enter a number : "; cin>>a; cout<<endl; if (a%2-1) cout<<"it is a prime number"; else cout<<"it is not a prime number" return 0; } ------------------------------------------ output: enter a number : 30 it is a not a prime number
/* Program to print prime numbers up to given number */ import java.util.*; public class Prime { public static void main(String args[]) { Scanner sc=new Scanner(System.in); System.out.println("Enter the number : (it prints prime numbers upto your given number)"); int n=sc.nextInt(); System.out.println("The Prime number upto "+n+" are : "); while (n>=0) { int count=0; for (int i=1;i<=n ;i++) { if (n%i==0) { count++; } } if (count==2) { System.out.print(n+" "); } n--; } } }
No 59 is a prime number because only 1 and itself can go into it.
29 is not a composite number; it is a prime number.
The prime factors of 24 are 2 and 3.