what does "Unexpected symbol '0' in class, struct, or infance member declaration"

i wright the code "public float 0,00f;

please help me.

It means, broadly speaking, that code is nonsense. Are you trying to initialise a float variable with the value 0? You haven’t named the variable, and you’ve got incorrect commas. Try this:

public float nameOfYourFloat = 0.0f;