broot

Return the integer $n-th root of $x, truncated toward zero.

Synopsis

my $x = Math::GMP->new(100);
print $x->broot(3);            # 4, since 4**3 = 64 and 5**3 = 125

$n must be a positive integer. For odd $n negative values of $x are fine; for even $n they croak inside libgmp.