1, data range: Integer (int) refers to the data type representing an integer, which can include positive integer, negative integer and zero. The range of integers depends on the programming language and the system used, and usually includes a limited integer range. Numerical type (floating point type, double precision type, etc.). ) refers to the data type that represents floating-point numbers (that is, parts with decimals), and can represent a wider range of values, including integers and decimals.

2. Storage mode: Integer variables are stored in computer memory in binary form, which usually occupies a fixed storage space. However, numerical variables are expressed in different ways, such as floating-point numbers stored in IEEE754 standard.

3. Accuracy: Integer variables have exact values, that is, their values are completely matched integers. However, numerical variables may lose precision, because they usually use a limited number of digits to represent floating-point numbers, so rounding errors may occur in floating-point calculations.

4. Operation mode: integer variables can perform integer operations, such as addition, subtraction, multiplication, division and modulo. Numerical variables can perform floating-point operations, including mathematical functions such as addition, subtraction, multiplication and division between floating-point numbers.