How to save variables in txt files while running in a loop

Here in the below code I want to save V in different txt files. Like V1,V2,V3,V4.....V10. or can I save all the data in one single .txt file ?

clc
clear all
close all
n=10;
for i=1:1:n
    for j=1:1:50
       V(i,j)=j^2+2*(i+1);       
    end
end

Answer 1

[KSSV]

 clc
clear all
close all
n=10;
for i=1:1:n
    for j=1:1:50
       V(i,j)=j^2+2*(i+1);       
    end
end
 dlmwrite('filename.txt',V)

Also to create the above matrix, loop is not required.

i = 1:n ;
j = 1:50 ;
[i,j] = meshgrid(i,j) ;
v = j.^2+2*(i+1) ; 
v = v' ;