Find the largest and smallest factor of a number in CSharp

using System; //  w  ww .  j a  v  a 2s .c  om
 
public class MainClass {     
  public static void Main() {    
    int i, j; 
    int smallest, largest; 
    int num; 
 
    num = 100; 
    
    smallest = largest = 1; 
 
    for(i=2, j=num/2; (i <= num/2) & (j >= 2); i++, j--) { 
 
      if((smallest == 1) & ((num % i) == 0))  
        smallest = i; 
 
      if((largest == 1) & ((num % j) == 0))  
        largest = j; 
 
    } 
 
    Console.WriteLine("Largest factor: " + largest); 
    Console.WriteLine("Smallest factor: " + smallest); 
  } 
}