window 1, @"Primality By Trial Division", (0,0,480,270)

local fn isPrime( n as long ) as Boolean
  long    i
  Boolean result

  if n < 2 then result = NO : exit fn
  if n = 2 then result = YES : exit fn
  if n mod 2 == 0  then result = NO : exit fn

  result = YES
  for i = 3 to int( n^.5 ) step 2
    if n mod i == 0 then result = NO : break
  next i
end fn = result

long i, j = 0

print "Prime numbers between 0 and 1000:"
for i = 0 to 1000
  if ( fn isPrime(i) != _false )
    printf @"%3d\t",i : j++
    if j mod 10 == 0 then print
  end if
next

HandleEvents