The "Paper fold" exercise is a program that emulates the folding of a paper and is meant to practice grid manipulation. This repository contains implementation of the paper fold exercicse in different languages.
For more details, please check README file of specific implementation.
The paper is a grid of letters and can be folded only vertically or horizontally (i.e folding lines and columns in a grid). The initial state of the paper is a grid where each cell is named with a letter (letter A in the cell (0,0), B in the cell (0,1) , ... (see picture below)).
One can fold horizontally one or more lines by folding the top part onto the bottom part (we will call this a top folding).
One can fold horizontally one or more lines by folding the bottom part onto the top part (we will call this a bottom folding).
One can fold vertically one or more columns by folding the left part onto the right part (we will call this a left folding).
One can fold vertically one or more columns by folding the right part onto the left part (we will call this a right folding).
The picture below describes these possible foldings.
