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Question by ILoveMyDada · Jun 22, 2017 at 11:24 AM · error messagestringif-statements

C20019 error with '>=' cannot be applied to operands 'string' and string'

I'm trying to make it so that when my static ball8 gets hit by a moving ball(ball), and the count is greater than or equal to 40, a yellow wall changes to red.

For some reason I get the error with && countText.text >= "40"..... but if I put && countText.text == "40", then everything is fine. Its just the '>' that messes everything up.

Any help would be appreciated. Thanks!

     if (ballCollideBall8.gameObject.tag == "ball" && countText.text >= "40") 
     {
         //Ball8.SetActive (false);
         LeftYellowSideWall.GetComponent<LeftYellowWall> ().ColorChangeRed1();
         Ball8.GetComponent<MeshRenderer>().enabled = false;
         Ball8.GetComponent<CircleCollider2D> ().enabled = false;
         ball8Green = false;
     }


 }
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Answer by Elarm00 · Jun 22, 2017 at 11:57 AM

You are trying to use '>=' operator on strings, which is not defined. You should be comparing numbers not literals. So first thing to do is convert your string to int. Ex.

 ...
 int count = Convert.ToInt32(countText.text);
 if (ballCollideBall8.gameObject.tag == "ball" && count >= 40) 
 ...

The reason why '==' operator works fine is because it`s actualy defined, so you can compare strings, like:

"aaa" == "aaa" - true "aaa" == "asa" - false

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avatar image ILoveMyDada · Jun 22, 2017 at 12:04 PM 0
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Thanks for the reply!

I tried putting the..."int count = Convert.ToInt32(countText.text);" in the void Start() above that code and the "Convert.ToInt32" ended up going red. Where should I be placing it?

avatar image ILoveMyDada · Jun 22, 2017 at 12:23 PM 0
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Never $$anonymous$$d I got it to work! Didn't have "using System" at the top. And then I placed the code just above the if statement like you have it.

Thanks a lot!

avatar image thedigitalminer ILoveMyDada · Jun 22, 2017 at 01:12 PM 1
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You really should be storing your ball count out of a string, in it's own integer not converting a string to an int. You can update your text using your int.

avatar image ILoveMyDada thedigitalminer · Jun 22, 2017 at 01:25 PM 0
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Yeah I'm going to try and adopt that habit for future projects. I'm only a month in on Unity so I'm still working out the learning kinks. Thanks!

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