RosettaCodeData/Task/Left-factorials/Sidef/left-factorials-4.sidef

for i (0..10, 20..110 `by` 10) {
    printf("!%d  = %s\n", i, left_fact(i))
}

for i (1000..10000 `by` 1000) {
    printf("!%d has %d digits.\n", i, left_fact(i).len)
}