Trace through each of the following loops by hand, stating what the output is. Answers to traces and the three small programs due February 19. You may do this one in assigned groups of 2. Make sure you put both your names on what you send. Only submit one per group.
  
1) prods=1
    for jj=[1:6]
       fprintf('%d  ',jj*jj-1)
        prods=prods*(jj+1);
       fprintf('xx')
     end
     prods

2) A='hellohowareyou?'
for  kk=[1:2:length(A)]
  A(kk)
end

2.5) B=[1 3 8 2 7 22 11 66]
  for jj= [1:length(B)]
     if mod(B(jj),2) == 0
        B(jj)=B(jj)+1
      else
        B(jj)=B(jj)-1
      end
   end




3)for ii=[1:6]
    for jj = [1:7]
        fprintf('*')
     end
     for kk = [1:ii]
        fprintf('8')
      end
     fprintf('\n')
    end


4)for ii =[1:7]
    for jj = [1:8]
      fprintf(' '%d' ',ii*jj)
    end
    fprintf('\n')
end


5)  for ii = [1:9]
         for jj=[1:ii]
             if (mod(jj,3)==0)
                fprintf('e')
             elseif (mod(jj,5 == 0)
                 fprintf('z')
             else
                 fprintf('o')
              end
          end
        fprintf('\n')
     end

6) for ii=[1:4]
        for jj=[1:3]
            A(ii,jj)=ii+jj
         end
    end
A

7)DNA = 'aaaggattaaaacccaaattt'
v=length(DNA);
for ii = [1:v]
DNA2(ii) = DNA(v-ii+1)
end
DNA2
DNA2 == DNA

8)
 DNA = 'aaaggattaaaacccaaattt'
count =0;
v=length(DNA);
ii=1;
while (ii<=v-2)
   if (DNA([ii:ii+2])== 'aaa')
         count=count+1;
         ii=ii+3;
     else
         ii=ii+1;
     end
end
count

9-11 ) write code to
Find the first location of a t in a string of DNA
Find the number of a certain string in a string of DNA, such as the number of 'tgaa'
Find the first location of a certain string in a string of DNA