func isint x .
if x mod 1 = 0
return 1
.
num[] = [ 25.000000 24.999999 25.0001 -2.1e120 -5e-2 0 / 0 1 / 0 ]
#
numfmt 10 0
for n in num[]
write n & " -> "
if isint n = 1
print "integer"
else
print "no integer"