What is the purpose of anonymous { } blocks in C style languages?

Question

What is the purpose of anonymous { } blocks in C style languages (C, C++, C#)

Example -

void function()
{

  {
    int i = 0;
    i = i + 1;
  }

          


        

Answer 1

You are doing two things.

1. You are forcing a scope restriction on the variables in that block.
2. You are enabling sibling code blocks to use the same variable names.