Programming-Idioms

n = norm2( data )

func Euclidean(data []float64) float64 {
	n := 0.0
	for _, val := range data {
		n += val * val
	}
	return math.Sqrt(n)

const n = Math.hypot(...data)

var n = Math.hypot.apply(null, data)

double n = 0d;
for(double value : data) {
	n += value * value;
}
n = Math.sqrt(n);

var
  data: array of double;
...
  n := norm(data);
...

my $data = [5.0, 4.0, 3.0, 2.0, 1.0];
my $n = gsl_blas_dnrm2(Math::GSL::Vector->new($data)->raw);

np.linalg.norm(adata2[:, 0:3] - adata1[ipc1, 0:3], axis=1)

n = np.linalg.norm(data)

data = Vector[5.0, 4.0, 3.0, 2.0, 1.0]
n = data.norm

fn euclidean(data: Vec<f64>) -> f64 {
    let mut n = 0.0;
    for i in data {
        n += i*i;
    }
    return sqrt(n as f64)
}
let n = euclidean(data);

data := #( 5 4 3 2 1 ).
n := data squared sum sqrt.