SOLUTION: How many 4 digit numbers are there in all

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Question 1102329: How many 4 digit numbers are there in all
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many 4 digit numbers are there in all
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If leading zeroes are allowed, eg 0001, there are 10,000 positive ones.
If not, from 1000 to 9999 --> 9000 numbers.
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Does -1000 count as a 4 digit number?
What about 12.34 ?