* It's a typo: Perhaps you meant a different word or abbreviation.
* It's specific to a particular textbook, curriculum, or teacher: Some instructors might use their own shorthand or abbreviations not widely understood.
* It's part of a larger phrase: The meaning of "int" might be clear within the context of a full sentence or question.
If you can provide more context (the full sentence, the topic being discussed, the source material), I might be able to help you understand what "int" refers to.