parse error on this function

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Pengzhan Lu
Pengzhan Lu 2016-11-15
回答： Jan 2016-11-15
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?

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回答（2 个）

Walter Roberson
Walter Roberson 2016-11-15
for i = LL : UL
or
while i <= UL
Jan
Jan 2016-11-15
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.

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