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• Security issues

• See also

• Notes and references

• Further reading

• External links

Support for code comments is defined by each programming language. The features differ by language, but there are several common attributes that apply throughout.

Most languages support multi-line block (a.k.a. stream) and/or single line comments. A block comment is delimited with text that marks the start and end of comment text. It can span multiple lines or occupy any part of a line. Some languages allow block comments to be recursively nested inside one another, but others do not.cite-ref-higham000-5-0[5]cite-ref-vermeulen000-6-0[6]cite-ref-javadude000-7-0[7] A line comment ends at the end of the text line. In modern languages, a line comment starts with a delimiter but some older languages designate a column at which subsequent text is considered comment.cite-ref-javadude000-7-1[7] Many languages support both block and line comments – using different delimiters for each. For example, C, C++ and their many derivatives support block comments delimited by /* and */ and line comments delimited by //. Other languages support only one type of comment.cite-ref-javadude000-7-2[7]

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