For example:
Char type is adopted, and a non-negative integer is represented by one byte. The minimum value is 0, and the maximum value cannot be 128.
Char type indicates the range:-128~shu 127.
The range of unsigned character types is 0~255. -use this type, it will be fine.
Extended data:
Integer constants are expressed as decimal integers. For example, 199 1, 0,-123 are all integer constants. While 52.0 or 13 1.4 are not integer constants.
Integer? Variables are stored at the length closest to the compilation environment. For example, in a 32-bit compilation environment, Integer is 32 bits, and its range is between -2 15 and 2 15- 1.
The type declaration character of an integer in VB is a percent sign (%). Pascal is an integer. In c language, it is abbreviated as int.
Baidu encyclopedia-integer