error CS0266 Cannot implicitly convert type `float' to `int'. An explicit conversion exists (are you missing a cast?)

Question

I'm trying to create a simple timer when a boolean equals true but I get an error CS0266

 using UnityEngine;
 using System.Collections;
 
 public class Controller : MonoBehaviour {
 
     public float Speed = 5f;
 
     public int invinsibleTimer = 0;
     public int invinsibleTime = 5;
 
     Rigidbody2D rb;
 
     public bool invinsible = false;
     // Use t$$anonymous$$s for initialization
     void Start () {
         rb = GetComponent<Rigidbody2D> ();
 
     }
 
     void Update(){
         if (invinsible == true) 
         {
             invinsibleTimer = invinsibleTime + invinsibleTimer;
             invinsibleTimer = invinsibleTimer - Time.deltaTime;
             if (invinsibleTimer == 0) 
             {
                 invinsible = false;
             }
         }
     }

Answer 1

Time.deltaTime is a 'float' datatype, w$$anonymous$$ch means it can hold decimal fractions. 'int' can't do t$$anonymous$$s, so converting from float to int can cause problems. In t$$anonymous$$s case it's better to use float everywhere.

  using UnityEngine;
  using System.Collections;
  
  public class Controller : MonoBehaviour {
  
      public float Speed = 5f;
  
      public float invinsibleTimer = 0; // i changed int to float
      public float invinsibleTime = 5;
  
      Rigidbody2D rb;
  
      public bool invinsible = false;
      // Use t$$anonymous$$s for initialization
      void Start () {
          rb = GetComponent<Rigidbody2D> ();
  
      }
  
      void Update(){
          if (invinsible == true) 
          {
              if(invisibleTimer<= 0){
              invisibleTimer = invisibleTime;  // in your code t$$anonymous$$s would be done every frame
 
          }
 
              invinsibleTimer = invinsibleTimer - Time.deltaTime;
              if (invinsibleTimer <= 0) // subtraction might cause t$$anonymous$$s number will be less than zero
              {
                  invinsible = false;
              }
          }
      }

Answer 2

Answer by tanoshimi · Mar 06, 2016 at 12:18 PM

You declare invinsibleTimer as an int on line 8:

 public int invinsibleTimer = 0;

But then on line 24, you're trying to subtract Time.deltaTime, w$$anonymous$$ch is a float:

 invinsibleTimer = invinsibleTimer - Time.deltaTime;

(Note that if you looked at the line numbers in the error message, you'd have been pointed to t$$anonymous$$s error straight away)

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error CS0266 Cannot implicitly convert type `float' to `int'. An explicit conversion exists (are you missing a cast?)

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