Definition of null character in English:

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null character

noun

Computing
A character denoting nothing, usually represented by a binary zero.
Example sentences
  • Remember the way strings work in C: they consist of a bunch of bytes followed by a null character, which has the value.
  • Additional null characters may follow the string, padding it out to a size that ensures the following structure is properly aligned.

For editors and proofreaders

Syllabification: null char·ac·ter

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