getting loop errors, need help

Im experimenting with loops and am getting errors such as "Assets/Loops.cs(36,22): error CS0103: The name `i' does not exist in the current context"

any ideas why?

using UnityEngine; using System.Collections;

public class Loops : MonoBehaviour {

 public class Target {//start class definition

 // properties
 public int id;    
 public string type;
 public string name;
 public int lvl;
 public int health;
 
 // A Method
 public void targetInfo () {
     print("unit: " + id);    
     print("ID: " + name);
     print("class: " + type);
     print("level: " + lvl);
     print("health: " + health);
     }
     
 } //end of class definition
 

//-------------------------------

 // Use this for initialization
 void Start () {
 
     Target[] unit = new Target[51];//create array
     
 for (int i = 1; i <= 50; i++);
     {
         
     unit[i] = new Target();//instantiating 50 objects
         
         unit[i].id = i;
         unit[i].type = "Merc";
         unit[i].name = "Yuri";
         unit[i].lvl = 12;
         unit[i].health = 200;
         
     }
             
 for (int i = 1; i <= 10; i++);
       {
         unit[i].targetInfo();
       }
     
  }
  

}