Question

I have two array definition and I want to do addition operation element by element without looping operation? for example:

decimal[] xx = { 1, 2, 3 };
decimal[] yy = { 6, 7, 8 };

the result I want is:

decimal[] zz = { 7, 9, 11 };

the addition operation is simple. Just add one by one for each element like

decimal[] zz = decimal[xx.Length];
for (int i=0; i<xx.Length;i++){
   zz[i] =xx[i] + yy[i];
}

But I don’t want to use looping operation.

Answer 1

You can’t do that without looping some way or the other.

Your array creation and loop should be:

decimal[] zz = new decimal[xx.Length];
for (int i = 0; i < xx.Length; i++){
   zz[i] = xx[i] + yy[i];
}

Or a more compact, but somewhat less readable version:

decimal[] zz = new decimal[xx.Length];
for (int i = 0; i < xx.Length; zz[i++] = xx[i] + yy[i]);

You can also use Linq extensions to do the looping:

decimal[] zz = xx.Select((x, i) => x + yy[i]).ToArray();

Or:

decimal[] zz = Enumerable.Range(0, xx.Length).Select(i => xx[i]+yy[i]).ToArray();