inner loop with same variable name as outer loop

c++, nested-loops

Solution

"Namespace" is kinda close.. but it is more about scope. The inner i hides/surpresses the outer i. You could think of another example:

{ 
 int i=0; //outer scope i.
 {
   int i =0; //this hides the outer scope i.. I can't use outer i here

 }
  i =1 ; //inner i is out of scope.. outer i is set to 1
}

Problem

assuming the following simple code: ``` for(int i=0; i < 1000; i++) { cout << "Outer i: " << i << endl; for(int i=0; i < 12; i++) { cout << "Inner i:" << i << endl; } } ``` Works very nice. The same variable name in both loops used and the output is fine. Do I understand it right that both variables are created on stack, and when the outer loop comes to the new inner loop, a new "namespace" (maybe the wrong name..) is created? But why is it overwritten? If I choose another name for the variable in inner loop I can also access the `i` from outer loop. A bit confused I am.

Original source