Scope of variable declared inside a for loop

Question

for(int i=0; i<10;i++){
 int j=0;
}

Is j a block variable or a local variable? I see that j\'s scope is only till the for loop ends

Answer 1

j has scope in the loop only, outside the loop, j can not be accessed. For more on scopes, refer the link, it will be helpful.

Answer 2

The word "local" means that something is available somewhere, but not outside the bounds of this "somewhere". In Java variables declared inside a block have a block scope, which means that they're available only inside this block - they're local to it.

Answer 3

It is a local variable to that for block. Outside of that for loop, j will cease to exist.

Answer 4

Local variables are declared in methods, constructors, or blocks.

From that it's clear that, All block variables are local variable's.

As per definition of Block

A block is a group of zero or more statements between balanced braces and can be used anywhere a single statement is allowed.

So

{   //block started

}    //block ended

What ever the variables declared inside the block ,the scope restricted to that block.

for(int i=0; i<10;i++){
 int j=0;
}

So J scope is restricted to inside that block. That is for loop.

for(int i=0; i<10;i++){
 int j=0;
 //do some thing with j ---> compiler says "yes boss"
}
//do some thing with j ---> compiler says "Sorry boss, what is j ??"

Answer 5

j variable is accessible inside {this block} only. That not only means that it can't be changed anywhere else, but also it is recreated every time loop loops.