scope of the variable

[veena bijur]

scope of the variable means what?

Please explain.

Thanks

[Jeff Verdegan]

Please SearchFirst(←click).

Here's a link to pasting your exact question into Google:
http://www.google.com/search?q=scope+of+the+variable+means+what?

[James Peterson]

Hi veena bijur,


Variable scope refers to the accessibility of a variable.

Example:
public class MainClass {

public static void main(String[] args) {
for (int x = 0; x < 5; x++) { // beggining of scope for variable x
System.out.println(x);
}//end of scope for variable x
}
//here you cant access x
}


In the above example if you observe variable x can be accessed only with in the for loop because the scope of x is with in the loop.

[Akhilesh Trivedi]

scope means availability or visibility or accessibility.

public static void main(String args[]){
	int a;
	public void myMethod(){
		// a is visible here.
		{
			// a is visible here too.
			int b;
		}
		// b is not visible here. scope of b is within the block { } between line 5 and 8.
		//a is visible here too.
	}
	// a is visible here too.
}

[Mansukhdeep Thind]

Welcome to the ranch Veena. Are you absolutely new to the Java language? Where are you learning from? Which book?

[veena bijur]

Thanks for the reply. i got it.

sir,
i am not new to Java ,just from interview point of view learning.

when such question asked was stuck.

[Mansukhdeep Thind]

Don't "sir" me Veena. I am yet to be knighted by the Queen of England. Your doubt sounded like a novice's. Hence, I asked. Anyways, let us know in case you are stuck. We are here to help.

[Campbell Ritchie]

Akhilesh Trivedi wrote:scope means availability or visibility or accessibility.
. . .

No it doesn’t. Visibility and accessibility are different from scope. It might mean availability, but I would go farther and say it means the very existence of the variable. Fields are always in scope for the whole class, so that problem does not exist there. But in a loop, like this one

for (int i = 0; i < myArray.length; i++)
{
   myArray[i] += i;
}// end of loop: i can be deleted
for (int j = 0; j < yourArray.length; j++)
{
   yourArray[j] -= j;
}

…the value of i is put on the stack, and at the end of the first loop, all records of what is on the stack may be gone. So the value of i can be deleted from the stack, or more precisely replaced by another value. Or, to put it another way, when the scope of i is finished, its very existence is finished too.