What is an Iterator?

[borasemiz]

What does an Iterator mean in C++? I came up with this word while I studying openCV.

  Mat I; //This is already assigned way back the full code.
  MatIterator_<uchar> it, end;
  for (it = I.begin<uchar>(), end = I.end<uchar>(); it != end; ++it)
    *it = table[*it];

[keskiverto]

http://www.cplusplus.com/reference/iterator/

[JLBorges]

See: http://www.mochima.com/tutorials/STL.html#Introduction

[borasemiz]

@keskiverto, @JLBorges

Thank you very much guys :)