Enter a number from the keyboard and find out the Even-Odd pairs within that number.

Here is the Java Example for Even-Odd pairs within that number:

import java.util.Scanner; 
 public class EvenOdd 
 { 
                       public static void main(String a[]) 
               { 
                       Scanner sl=new Scanner(System.in); 
                       System.out.print("Enter Number: "); 
                       int n = sl.nextInt(); 
                       int odd[]= new int[2]; 
                       int eve[] = new int[2]; 
                       int o =-1, e =-1; 
                       StringBuffer sb = new StringBuffer(); 
                       for(int i=1;i<=n;i++) 
                           { 
                                    if(i%2==0) 
                                      { 
                                      e++; 
                                      eve[e]=i; 
                                        } 
                                      if(e==1) 
                                        { 
                                           sb.append(eve[0] + " " + eve[1] +" "); 
                                           e = -1; 
                                         } 
                                       if(i%2 !=0) 
                                         { 
                                              o++; 
                                              odd[o]=i; 
                                          } 
                                        if(o==1) 
                                         { 
                                             sb.append(odd[0]+ " " + odd[1]+","); 
                                             o = -1; 
                                          } 
                               } 
                                   System.out.println(sb.delete(sb.length()-2, sb.length())); 
                   } 
 }