What is the initial value of (-1-17) and (-3-15)?

Answer 1

When we talk about instance variables, the default initial value for a numeric variable is always '0'. Any other variable in your code must be initialized before you can use it.

public class MyClass{

public int x; // 0 by default

public float y: // 0 by default

public MyClass{

int z;

z++; // Error 'z' don't have a default value

}

}