How can I add a toggle to this FPS counter script?

Question

Hello, I am using the standard fps counter script and I am wondering how I could ad a toggle to it. Basically so it's invisible unless you press a button on the keyboard. Thank you in advanced. Here's the script:

     using System;
     using UnityEngine;
     using UnityEngine.UI;
     
     namespace UnityStandardAssets.Utility
     {
         [RequireComponent(typeof (Text))]
         public class FPSCounter : MonoBehaviour
         {
             const float fpsMeasurePeriod = 0.5f;
             private int m_FpsAccumulator = 0;
             private float m_FpsNextPeriod = 0;
             private int m_CurrentFps;
             const string display = "{0} FPS";
             private Text m_Text;
     
     
             private void Start()
             {
                 m_FpsNextPeriod = Time.realtimeSinceStartup + fpsMeasurePeriod;
                 m_Text = GetComponent<Text>();
             }
     
     
             private void Update()
             {
                 // measure average frames per second
                 m_FpsAccumulator++;
                 if (Time.realtimeSinceStartup > m_FpsNextPeriod)
                 {
                     m_CurrentFps = (int) (m_FpsAccumulator/fpsMeasurePeriod);
                     m_FpsAccumulator = 0;
                     m_FpsNextPeriod += fpsMeasurePeriod;
                     m_Text.text = string.Format(display, m_CurrentFps);
                 }
             }
         }
     }

Answer 1

using System; using UnityEngine; using UnityEngine.UI;

  namespace UnityStandardAssets.Utility
  {
      [RequireComponent(typeof (Text))]
      public class FPSCounter : MonoBehaviour
      {
          public KeyCode toggleKey ;
          const float fpsMeasurePeriod = 0.5f;
          private int m_FpsAccumulator = 0;
          private float m_FpsNextPeriod = 0;
          private int m_CurrentFps;
          const string display = "{0} FPS";
          private Text m_Text;
          private bool hidden ;
  
          private void Start()
          {
              m_FpsNextPeriod = Time.realtimeSinceStartup + fpsMeasurePeriod;
              m_Text = GetComponent<Text>();
          }
  
  
          private void Update()
          {
             if( Input.GetKeyUp( toggleKey ) ) 
                 Toggle() ;

             if( hidden )
                 return ;

              // measure average frames per second
              m_FpsAccumulator++;
              if (Time.realtimeSinceStartup > m_FpsNextPeriod)
              {
                  m_CurrentFps = (int) (m_FpsAccumulator/fpsMeasurePeriod);
                  m_FpsAccumulator = 0;
                  m_FpsNextPeriod += fpsMeasurePeriod;
                  m_Text.text = string.Format(display, m_CurrentFps);
              }
          }

          public void Show()
          {
              hidden  = false;
              m_Text.gameObject.SetActive(true) ;
          }

          public void Hide()
          {
              hidden = true ;
              m_Text.gameObject.SetActive(false) ;
          }

          public void Toggle()
          {
              if(hidden)
                  Show() ;
              else
                  Hide() ;
          }
      }
  }

How can I add a toggle to this FPS counter script?

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