Hi Chris,
That command is one of the most complicated command I have ever encountered. It just needs to be broken down into regular Basic, then it becomes comprehensible.
'2018-03-24 T 21:29:07
'ARRAY SCAN FUNCTIONALITY
int a={2,4,6,8,1,3,5,7,9} 'some data for testing
int i,j
j=0
for i=1 to countof a
if a[i]<2 then j=i : exit for
next
print j '5'