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Trigraphs are sequences of three characters in programming languages that represent a single character not easily typed on a keyboard. They typically begin with two question marks (??) followed by a third character, and are used to ensure code portability across different systems. For example, in C and C++, the trigraph ??= represents the equals sign (=). While trigraphs can be useful, they are rarely needed in modern programming due to the availability of standard keyboard characters.

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1d ago

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