Checking if a number is divisible by 25 (or any number)

Pulp
1

Hey! I could use a little help with Pulpscipt. Is there a way to check is a var is divisible by a certain number? Currently I've got this working code, but I think it could be cleaner:

if count==25 then
  ytile++
  xtile = 0
elseif count==50 then
  ytile++
  xtile = 0
elseif count==75 then
  ytile++
  xtile = 0
elseif count==100 then
  ytile++
xtile = 0

Basically I need to do something every 25 times in a loop, anyone have any ideas?

2

You’re looking for an operator called modulo, often referred to as just “mod” and represented as %. It returns the remainder when the first operand is divided by the second. For example: 7 % 2 — spoken “seven mod two” — is 1.

For your use case, you’ll want to check if a number mod 25 is zero, meaning there is no remainder when dividing by 25:

if count % 25 == 0 then
  ytile++
  xtile = 0
end
1 Like
3

Oh, I just realized that the mod operator isn't available in PulpScript. However, this thread contains a workaround.

4

Ah perfect, that thread worked for me! If anyone was wondering, here's the working code:

//check if count is multiple of 25 (one complete row)
mod = count
mod /= 25
mod -= floor mod
mod *= 25
		
//if yes, let's move to the next row
if mod==0 then
  ytile++ //move our Y coord +1
  xtile = 0 //move our X coord back the start
else
  //look ma, no hands!
end

All total it saved me about 60 lines of code, so that's pretty neat!