[ranchani]

Write a JAVA program in which a positive whole number is first read in. A ‘for-loop’ is used to extract the factors of the given number. If there are no factors in the range 2 to (n-1), then that number should be a prime number. A break statement is used to transfer the control out of the for loop, if there is a factor ?

[shabbir]

Show your code i.e. the attempt to code it

[ranchani]

Quote:

Originally Posted by shabbir

Show your code i.e. the attempt to code it

actually i don't know to code it............tats my probs....i just know how 2 begin

   import java.io.*;
            class Number
            {
            Public static void main (String [] args) throws IOException
                      {
                      System.out.print(“Enter the number:”);
                     InputStreamReader reader = new InputStreamReader(System.in);
                     BufferedReader in =new BufferedReader(reader);
                     String text=in.readLine();

[shabbir]

Then first get the code as submission of codes from any online forum will not be of any help

[ranchani]

thanz 4 the advice ill try 2 write the code as much as i can......................

[virxen]

maybe this is what you want.Try and tell me.

import java.io.*;
public class Number1{
    
public static void main (String [] args) throws IOException{
    
    InputStreamReader reader = new InputStreamReader(System.in);
    BufferedReader in =new BufferedReader(reader);
    String text="";
    int number=-1;
    while(number<=0){
        System.out.print("Enter the number:");
        text=in.readLine();
        try{
           number=Integer.parseInt(text);
           if (number<=0) System.out.println("number must be positive and not 0!!!");
        }catch(NumberFormatException e){
           System.out.println("error enter a number!!!");
        }
        
    }
    //now you have a number to check for factors
    if (number==1) 
           System.out.println("1 is prime number");
    else{
        int n=number;
        int i;
        int factors=0;
        for (i=2;i<n;i++){
            while (number%i==0){
                 factors++;
                 number/=i;
                 System.out.println("factor="+i);
            }
            
        }
        if (factors>0) 
             System.out.println("\nnot a prime number");
        else
             System.out.println("\nit is a prime number!!!");
    }    
}
}

[Chantheeya]

Hey varsha!! I hope u got the code for this program... Otherwise, get it from me in class!!!

[shabbir]

Quote:

Originally Posted by Chantheeya

Hey varsha!! I hope u got the code for this program... Otherwise, get it from me in class!!!

Sounds interesting.

[ranchani]

hey thankz every1 4 helping me................

[atsukoarai86]

I think your problem may be more of a failure of logic than a failure of java. If I were you, I would attempt to formulate an algorithm to solve the problem in question then flesh it out in pseudocode then convert it to java syntax.

If the problem is that you don't understand how to actually write the code in java but you understand how to solve the problem, that would be a question that I'm sure your java teacher would be happy to answer.