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Comments on Single digit Roman numeral

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Single digit Roman numeral

+3
−0

Given a single character, which is a valid Roman numeral, output its value.

Values

There are 7 valid single character Roman numerals, with the following values:

Character Value
I 1
V 5
X 10
L 50
C 100
D 500
M 1000

Input

  • A single character, which will always be one of IVXLCDM.

Output

  • The corresponding value.
  • The output value must not be a Roman numeral.

Test cases

As there are only 7 valid inputs, the list of test cases is exhaustive.

Test cases are in the format "input" : output.

"I" : 1
"V" : 5
"X" : 10
"L" : 50
"C" : 100
"D" : 500
"M" : 1000

Scoring

This is a code golf challenge. Your score is the number of bytes in your code.

Explanations are optional, but I'm more likely to upvote answers that have one.

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2 comment threads

Allowed output formats? (4 comments)
Similar challenge (1 comment)
Allowed output formats?
H_H‭ wrote about 1 year ago

Do you have any restrictions on the output format?

trichoplax‭ wrote about 1 year ago · edited about 1 year ago

I'm happy to stick with the defaults for I/O unless there's some loophole I need to close.

One of the answers there mentions using a character code instead of a number, which would allow outputting 1000 as "Ϩ" (unicode codepoint U+03E8) but I'm not sure that's going to help anyone...

Did you have a particular output format in mind? I can add an explicit decision to the challenge if it's not covered by the defaults.

H_H‭ wrote about 1 year ago · edited about 1 year ago

Is ,. as a solution allowed, then? (i would consider this a loophole for this particular challenge).

Even when you explicit forbid this form of output, it could still be made possible by using a special form of character encoding for the input. A encoding where I has the number 1, V the number 5, ...

trichoplax‭ wrote about 1 year ago

Good point. I will edit to make explicit that output in Roman numerals is not acceptable.

As for choosing a text encoding where the output always equals the input, I would likely vote to agree that should be a forbidden loophole if you added it to Code Golf - Default Rules: Loopholes