Question

why do roman numerals dont have zero in it?
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Answer 1

Because it was unknown to them.... lolz but it is a fact....

Answer 2

$\huge \underline \mathsf \red {AnsWer:-}$

Roman number system does not contain the number zero. The roman number system was basically designed to estimate the prices of goods and trading business. So the roman system did not need any value to represent zero. But instead of zero, the word nulla was used by the Romans to specify zero. I Latin language the word nulla means none. Hence nulla is used t represent zero but there is no specific symbol for zero to represent in roman number system.