appending to a list or an array

I have three very long arrays of equal length. for each entry at a given index, I want to return the product of the three entries belonging to the three lists and put it in a new list. In other words, I want the index of the product to match the index of the three numbers multiplied to achieve it.

in python this is what I'm trying to do:

i 
L1=[1,2,3]
L2=[1,2,3]
L3=[1,2,3]
L4 = []
for I in range(0,3):
   L4 += L1[I]*L2[I]*L3[I]

I tried using the append([],item) function and it's not working.

would greatly appreciate help!

Answer 1

[KSSV]

You need not to run a loop for this. Read about element by element operations in matlab.

https://in.mathworks.com/help/fixedpoint/ref/times.html

L1=[1,2,3] ;
L2=[1,2,3] ;
L3=[1,2,3] ;
L4 = L1.*L2.*L3 ;