bigint and pow

[rassoc]

On 10/2/22 00:04, Fausto via Digitalmars-d-learn wrote:
> Hello,
> 
> I am trying to use pow with an integer argument, but I cannot have a bigint result, for example, ```pow(10,72)```.
> Do I have to write my pow function or is there a native solution?
> 
> thanks,
> Fausto
> 

In contrast to certain scripting languages, there's no implicit promotion, you have to opt in for BigInt [1] usage in D:

```d
import std;
void main()
{
     // all print the same
     writeln(BigInt(10) ^^ 72);
     writeln(10.BigInt ^^ 72);
     writeln("10".BigInt ^^ 72);
}
```

[1] https://dlang.org/phobos/std_bigint.html#.BigInt