Boolean data type

using UnityEngine;
using System.Collections;
 
/// <summary>
/// A simple AI walking script. Follows a target.
/// </summary>
public class AIWalker : MonoBehaviour
{
 
    internal Vector3 target;
    private CharacterController controller;
    private int counter = 0;
    private Vector3 avoidNormal;
    private Vector3 semiStaticDirection;
 
    private RaycastHit hit;
 
    /// <summary>
    /// The delegate that will execute the current state of the FSM.
    /// </summary>
    private delegate void FState ();
    private FState stateMethod;
 
    /// <summary>
    /// Returns the vector of the current forward motion of the controller.
    /// </summary>
    /// <value>
    /// Returns a vector.
    /// </value>
    private Vector3 forward {
        get { return transform.TransformDirection (Vector3.forward); }
    }
 
    /// <summary>
    /// Helper function to get a right or left vector.
    /// </summary>
    /// <value>
    /// Returns left of right (Vector3).
    /// </value>
    private Vector3 randomLeftOrRight {
        get { return UnityEngine.Random.value > 0.5 ? Vector3.right : Vector3.left; }
    }
 
    /// <summary>
    /// Calculates the direction to the target object.

using System;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
 
/// <summary>
/// Needs work.
/// </summary>
public class Inventory : MonoBehaviour {
 
    private Dictionary<string, int> backpack;
 
    private bool showInventory;
 
    void Awake () {
    }
 
    void Start () {
        DisplayInventory (true);
    }
 
    public void DisplayInventory (bool state) {
        showInventory = state;
    }
 
    public bool RemoveObject (string iObject, int number) {
        try {
            backpack[iObject] = backpack[iObject] - number;
            if (backpack[iObject] <= 0) {
                backpack.Remove (iObject);
            }
            return true;
        } catch (Exception ex) {
            print ("[" + this.GetType ().ToString () + "] The object " + iObject + " does not exist.");
            return false;
        }
 
    }
 
    public bool AddObject (string iObject, int number)
    {
        if (backpack.ContainsKey (iObject)) {
            backpack[iObject] += number;
        } else {
            backpack[iObject] = number;
        }
        return true;
    }
 
    void OnGUI () {
        if (showInventory) {
            int counter = 0;
            foreach (KeyValuePair<string, int> kv in backpack)
            {
                string displayString = kv.Key + ": " + kv.Value.ToString ();
                GUI.Label (new Rect (10, counter * 40, 200, 30), displayString);
                counter++;
            }
        }
    }
}

using System;
using UnityEngine;
using System.Collections;
 
public class ChickenCounter : MonoBehaviour
{
    private int counter = 0;
    public GameObject particleEffect;
 
    void OnTriggerEnter (Collider hit)
    {
        if (hit.tag == "bonus") {
            counter++;
            Instantiate (particleEffect, hit.transform.position, hit.transform.rotation);
            Destroy (hit.gameObject);
        }
    }
 
    void OnGUI () {
        GUI.Label(new Rect(10,10,200,30),