What are some examples of const expressions in C++?

What are some examples of const expressions in C++?

In C++, a const expression is an expression that can be evaluated at compile time. For example, you can define a constant integer like this: const int x = 10;.

Can you give me more complex examples?

Sure! You can use const expressions in array sizes: const int size = 5; int arr[size];. This allows you to define the size of the array at compile time.

Are there any limitations to using const expressions?

Yes, const expressions must be initialized with constant values and cannot be modified after their declaration.

How do const expressions differ from regular constants?

Const expressions are evaluated at compile time, while regular constants can be evaluated at runtime. This can affect performance.