Inner block variable scope : block scope variable « Language Basics « C++ Tutorial

1. C++ Tutorial
2. Language Basics
3. block scope variable

#include <iostream> 
using namespace std; 
 
int main() 
{ 
  int i; 
  int j; 
 
  i = 10; 
  j = 100; 
 
  if(j > 0) { 
    int i; // this i is separate from outer i 
     
    i = j / 2; 
    cout << "inner i: " << i << '\n'; 
  } 
 
  cout << "outer i: " << i << '\n'; 
 
  return 0; 
}

inner i: 50
outer i: 10