;;; loops.pro: to run this script, at the idl prompt type
;;; .run loops
;;; 
;;; this is an example of for and if-then-else statements:
;;; define an array filled with 15 random numbers, loop
;;; through and if value < 0.5 then set to zero, otherwise
;;; set to 1.0

ep = 15
m = randomu(seed, ep)

print, m

for i = 0, ep-1 do begin
	if (m(i) lt 0.5) then begin
		m(i) = 0.0
	endif else begin
		m(i) = 1.0
	endelse
endfor

print, m

end