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Roman numerals use seven letters: I, V, X, L, C, D, M. The converter handles numbers 1 to 3,999 in both directions, converting integers to numerals and validating numerals back to numbers.
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Standard Roman numerals run from 1 to 3,999. There is no symbol for zero.
IV = 4, IX = 9, XL = 40, and so on.
No. Roman numerals have no symbol for zero, which is one reason the system was eventually replaced.
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