parse error on this function

I want to calculate the sum of all the integers between (including) the lower and upper limits by using for loop. here is my code.

LL=input('Please enter an integer as lower limit.\n');
UL=input('Please enter an integer as upper limit.\n');

sum=0;
i=LL;

for i<=UL
    sum=sum+i;
    i=i+1;
end

I don't know why there is a parse error at '<='. can someone help me?

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Walter Roberson]

for i = LL : UL

or

while i <= UL

Answer 2

[Jan]

Please read the "Getting Started" chapters of the documentation and the help text of "for":

help for

Then:

LL = input('Please enter an integer as lower limit.\n');
UL = input('Please enter an integer as upper limit.\n');

S = 0;  % Do not shadow the built-in function "sum"
for i = LL:UL
  ...
end

Do not increase "i" manually, because this is done by for already. If left the summation of S up to you, such that you can at least provide this solution whithout cheating - assumed that this is a homework.