Difference between size_t and size_type

[deathslice]

here are two code example that I've found.

string str;
for(string::size_type i=0; i < str.length(); i++)
    {
      str[i] = toupper (str[i]);
    }

   vector<int> myvector;
  for(size_t i=0; i < myvector.size()-1; i++)
    {
        cout << myvector[i];
    }

[keskiverto]

The std::string::size_type is a member type.
http://www.cplusplus.com/reference/string/string/

There is a std::vector::size_type too:
http://www.cplusplus.com/reference/vector/vector/

The std::size_t is a stand-alone type definition/alias.

[MiiNiPaa]

You can think about std::size_t as ::size_type for C arrays.