C++ Variable Block Scope

Introduction

The block-scope is a section of code marked by a block of code starting with { and ending with }.

Example: 

int main() 
{ 
    int x = 123; // first x' scope begins here 
    { 
        int x = 456; // redefinition of x, second x' scope begins here 
    } // block ends, second x' scope ends here 
      // the first x resumes here 
} // block ends, scope of first x's ends here



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