Re: Complex square root of -1 : zsqrt(-1)

Just out of curiosity I tried it in 8th:
ok> -1+0i 0.5 c:^ .
0.000000+1.000000i
and then:
ok> -1+0i 0.5 c:^   dup c:* .
-1.000000+0.000000i
On 25/08/2024 11:34, ahmed wrote:

Hi,
With gforth, complex.fs included.
 When calculating the square root of -1, I find that:
-1e 0e 0.5e 0e z** z. 0.0000000000000000612303176911189+1.i  ok
-1e 0e zsqrt z. NaN ok
  What's the problem with zsqrt?
 NB.
-1e 1e-16 zsqrt z. 0.0000000000000000612303176911189+1.i  ok
-1e 1e-100 zsqrt z. 0.0000000000000000612303176911189+1.i  ok
  Ahmed