martix with mod question

i have the following code

for i=1:n1*n2
for j=1:n1*n2
gi=mod(i,n2)
if(~gi)
gi=n2;
end
gj=mod(j,n1)
if(~gj)
gj=n1;
end

where n1= 8 and n2 = 6 what exactly each line means ????

thanks

[Luffy]

Your code doesn't work,for loops don't end,what are gi & gj,

Answer 1

[Luffy]

 Explained,
 for i = 1:n1*n2   %  for loop with i increasing from 1 to n1*n2(48 in your case)
 for j = 1:n1*n2   %  for loop with j increasing from 1 to n1*n2 
 gi = mod(i,n2);   %  modulo operator(example:if i is 4,mod(4,6)=4=g4)
 if(~gi)           % for all those gi which are not zero they are equal to n2
 gi = n2;
 end
 gj = mod(j,n1);   % similar to i
 if(~g2)
 gj = n1;
 end
 end
 end