Subtracting a float from another float does not equal a float?-CodePudding

I am coding with the unity scripting API but I don't think that changes anything.

I have a variable playerMovementScript.rightWallX that is a float and is equal to -20.84.

I then have this line of code:

Debug.Log(-21.24f == playerMovementScript.rightWallX - 0.4f);

It always prints false. I feel like I'm missing something obvious cause I'd like to think I'm not THAT new to coding. Any help would be appreciated.

CodePudding user response：

Floating points not accurate. Use them only for fast calculations. If u want to compare 2 floats use if (Mathf.Approximately(floatA,floatB))

CodePudding user response：

The reason it prints false is because you are using the == operator, which checks if 2 things are equal, therefore since you are doing -21.24f == playerMovementScript.rightWallX - 0.4f, the result is unequal and then it prints false. I am pretty sure you meant =, but we all make mistakes.