• Brother Bill (13/13) Nov 09 When declaring a variable, we may add const or immutable to its
• Steven Schveighoffer (4/6) Nov 09 My answer from before:
• Brother Bill (3/9) Nov 09 Thank you. I missed that you had already covered this question.

Brother Bill <brotherbill mail.com> writes:

When declaring a variable, we may add const or immutable to its 
type.

```
const     int a = 86; // typeof(a).stringof is const(int)
immutable int b = 99; // typeof(b).stringof is immutable(int)

const     int[] array_a = [42, 100]; // typeof(array_a).stringof 
is const(int[])
immutable int[] array_b = [42, 100]; // typeof(array_b).stringof 
is immutable(int[])
```

They seem to have identical behavior, at least in the simple case.

My question is how does D treat these types differently?
When should one pick one vs. the other?

Steven Schveighoffer <schveiguy gmail.com> writes:

On Sunday, 9 November 2025 at 23:17:44 UTC, Brother Bill wrote:

 My question is how does D treat these types differently?
 When should one pick one vs. the other?

My answer from before: 
https://forum.dlang.org/post/wkrdjxxkjzrtwqzmwijx forum.dlang.org

-Steve

Brother Bill <brotherbill mail.com> writes:

On Monday, 10 November 2025 at 04:47:44 UTC, Steven Schveighoffer 
wrote:
 On Sunday, 9 November 2025 at 23:17:44 UTC, Brother Bill wrote:

 My question is how does D treat these types differently?
 When should one pick one vs. the other?

 My answer from before: 
 https://forum.dlang.org/post/wkrdjxxkjzrtwqzmwijx forum.dlang.org

 -Steve

Thank you.  I missed that you had already covered this question.