How is the default value of int and float 0 and 0.0f ;

Question

If those are the default values then why error arises if we use the value without initializing
{
int a;
System.out.println(a);
//error : a not defined
}
So , how can we say that the default value of int is 0 and float 0.0f (every source tells this).

Answer 1

Local variables are not given their default values to avoid possible bugs.
More info: https://stackoverflow.com/questions/415687/why-are-local-variables-not-initialized-in-java

Answer 2

@Restoring faith
Thanks ,
That's weird , means in the class containing main method , the variables will not take their default values but in other classes they will o_O