I guess it depends on what is meant by "6 digit number". If it means "a number more than the greatest 5 digit number (99,999) but less than the least 7 digit number (1,000,000)", which is probably the case, then this works.

The other possible definition is "A combination of numbers 0 through 9 taken 6 times." In that case, you could do this:
@numbs = '000000' .. '999999';