Write a program that will break a long text at a particular position interval being specified

Recently a colleague of mine approached to me and ask me that he has a requirement where he is reading a huge string of data and that needs to be break into a newline at a particular position (this is again configurable). I have written a pseudo code for him which is as under

static void Main(string[] args)
        {
            var input = "abcdefghijklmnoppqrstuvwxyz. I am great and so you are".ToCharArray();
            var breakAtPosition = 4;
            StringBuilder sb = new StringBuilder();

            for (int i = 0; i < input.Length; i++)
            {
                sb.AppendLine(input.Skip(i).Take(breakAtPosition).Aggregate("", (a, b) => a + b));
                i = i + (breakAtPosition - 1);
            }
            Console.WriteLine(sb.ToString());
            Console.ReadKey();
        }

Here we are breaking the long words at the fourth position. Let us understand the code. Initially we have converted the supplied string to a character array. In the first case when the loop ran, the value of

 i=0

and

breakAtPosition = 4

. So

sb.AppendLine(input.Skip(i).Take(breakAtPosition)

will yield "a b c d" and then the Aggregate Operator will use these characters and join them into a single string. The new value of "i" will be

 i = i + (breakAtPosition - 1);

i.e. i = 0 + (4-1)  = 3.

When again the loop run, "i" value gets an increment to 4 and the

Skip

operator has skipped the first four charterers (i.e. "a b c d ) and the

Take

operator has fetched the next four characters (i.e. "e f g h"). and in this way the logic repeats until the condition turns out to be false. The final output is as under

Output

abcd
efgh
ijkl
mnop
pqrs
tuvw
xyz.
 I a
m gr
eat
and
so y
ou a
re