hi every one , i need help to do this in matlab if it's possibile, thank you

A=[ 1 2 3 4 5 6 7 8 9 10 ]
B=[ 10 11 12 13 14 15 16 17 18 19 20]
C=[ 21 22 23 24 25 26 27 28 29 30] 

for n=1:10 
if n==1  & 6<=n<=9                              % if n is uquale to this value i need to make this operation
X=A+B
if n==2 & 3<=n<=5                           % if n is uquale to this value i need to make this operation
X=A+B+C
else                                                   % else in need to make this 
X=B+C

end 
end 

tnak you

[Stephen23]

Disregarding the MATLAB syntax bug, when do you expect these logical conditions to be true?:

n==1 & 6<=n<=9
n==2 & 3<=n<=5

Can you give any value of n for which this will be true? Fixing the syntax bug gives:

n==1 & 6<=n & n<=9
n==2 & 3<=n & n<=5

but still no value of n that will ever produce a true output. Did you really mean to use OR ?:

n==1 | (6<=n & n<=9)
n==2 | (3<=n & n<=5)

[mina massoud]

thank you very much , i accept ur wonderful answre now.