• tcak (5/5) Jun 04 2015 [code]
• anonymous (10/15) Jun 04 2015 All it does is it makes the variable "a" const:

"tcak" <tcak gmail.com> writes:

[code]
void test( const int a ){}
[/code]

Does that "const" make any difference at all? At the end, it is a 
scalar, and passed as value.

"anonymous" <anonymous example.com> writes:

On Thursday, 4 June 2015 at 11:28:51 UTC, tcak wrote:
 [code]
 void test( const int a ){}
 [/code]

 Does that "const" make any difference at all? At the end, it is 
 a scalar, and passed as value.

All it does is it makes the variable "a" const:
----
void test( const int a )
{
     a = 42; /* Error: cannot modify const expression a */
}
----

But the value is copied, yes. You can pass a mutable int in an 
immutable parameter and vice-versa.