Including signed integer and unsigned integer, divided by data length, including short integer, integer and long integer.
The standard integer type is int. Generally speaking, it only refers to integers, and other integer types are also referred to as integer variables.
The keywords included are:
Short integer long unsigned
There are many other common types of built-in variables, such as:
Unit: unsigned integer
LONG: long integer
WORD: unsigned short integer
DWORD: unsigned long integer