trying to find L2 norm using for loops. where am I doing wrong?

clear all
clearvars

x = [1.21, -3.42, 10.01, -0.13, -5.11, -1.29, 3.87, 2.16, -3.21, 0.02]

n = length(x)
sumx = 0
for x = 1: n

sumx =  sum + [x(n)^2]

end
L2 = sqrt(sumx)

Answer 1

[KSSV]

x = [1.21, -3.42, 10.01, -0.13, -5.11, -1.29, 3.87, 2.16, -3.21, 0.02] ;
n = length(x) ;
sumx = 0 ;
for i = 1: n
sumx =  sumx + x(i)^2 ;
end
L2 = sqrt(sumx)

[Aash]

thanks very much for your quick help

[KSSV]

Thanks is accepting the answer....:)