只要没有混合的类型表达式，就可以在常数说明中使用算术运算符。

You can use arithmetic operators within your constant declarations as long as there are no mixed type expressions.

youdao

二者的实现基础完全相同，即在编译时将“var”替换成为分析得到的正确的变量或数组类型表达式。

Both work fundamentally the same way, at compile time the keyword "var" is replaced with the correct scalar or array type for the associated expression.

youdao

这些类型涵盖了所有表达式。

These types will cover all your expressions.

youdao