In Java, num refers to the name of a variable; the full name of num is number, which refers to the naming of a variable of numerical type. Under normal circumstances, when naming, we will try to make the name concise and clear, and can be understood by most people, so situations like num will occur.
Java is a computer programming language. It has many keywords, each with its own meaning. This requires users to use it carefully when naming. Keyword naming. However, is the num I am about to say a keyword? What special meaning does it have in Java?
It is not a keyword, it means num variable name. num is number, which refers to the naming of a variable of numerical type.
Under normal circumstances, when naming, we will try to make the name concise and clear, and can be understood by most people, so situations like num will occur.
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