Variable Initialiazation

[winwin]

I'm here would like to know about the variable declaration.
I found that if we define more than one variable with the same name, it will be an error - >1.e: Variable 'test' is already defined in this method.
But we fefined it inside the loop (as shown below), it has no error, may I know why??? how it works techinically?

Define out of the loop
int test = 1;
int test = 2;


Define inside the loop

for(int count=0;count<5;count=count+2){

int test = 1;
}

pls advice.....

[sjalle]

That one does not compile. The test defined
outside the for-loop's brackets has a scope that covers
the one inside the loop brackets and therefore is a
duplicate definition. If the variables in your example are
class-vrliables ans your loop is inside a method, then
the its ok.

this fails to compile:

int b=4; // definition scope covers form here to the end of the method that contains the loop
.
.
for (int i=0;i<5;i++) {
      int b=7;  // double definition
}

this is ok:

for (int i=0;i<5;i++) {
      int b=7; // definition scope is from here to the first right-bracket
}
int b=4; // this has no 'backwards' scope

Check out the java rules on variables' definition scope.