Single (single-precision floating-point type) variables are stored as IEEE 32-bit (4 bytes) floating-point values, ranging from -3.402823E38 to-1.40 1298E-45, and negative values range from1.4012995. The type declaration character of Single is exclamation mark (! )。

Long integer variables are stored as 32-bit (4 bytes) signed values ranging from -2,147,483,648 to 2,147,483,647. The type declaration character of Long is ampersand; )。

The range of numerical values that can be expressed is different.