How do you use distance calculator in procedure function and how to compare this?

MIT App Inventor Help
1

blocks
blocks1429×699 69.7 KB
DISClac.aia (3.1 KB)

2

What is the issue? Your distance formula looks OK.

3

Why is your distance function ignoring its parameters?

Please read http://www.appinventor.org/bookChapters/chapter21.pdf
of book http://www.appinventor.org/book2
from FAQ Section: Books, Tips, Tutorials for AI2

4

Actually, on a second look, your formula was wrong.

I have re-written your blocks so that they look and work correctly.

There are two points, P1 and P2, each have x,y values

image
image678×615 51.5 KB

best to test with points on a right angled triangle, e.g. 3,4 > 5 or 120,160 > 200

5

What did you see?

I see (x2-x1)^2 instead of (x1-x2)^2, but the squaring operation washes away the negative sign, leaving you with a correct result.

6

but you are correct, it shouldn't make any difference....