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Error using function: Not enough input arguments.

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Astrik
Astrik 2016-8-5
编辑： John D'Errico 2016-8-5
I get the following error every time i try to run a simple function
Not enough input arguments. My code is the following
function S = myfirstmatlab (n )
% gives the sum of the first n integers
S = 0; % start at zero
% The loop :
for i = 1: n % do n times
S = S + i; % add the current integer
end % end of the loop
Can someone help me to figure it out? The answers to similar questions did not help me.

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John D'Errico
John D'Errico 2016-8-5
编辑：John D'Errico 2016-8-5
You don't RUN a function.
IMHO, run (or use of it from the menu) is the worst thing they ever introduced into MATLAB, in terms of newbies misusing the tool.
When you write a function, in order to use it, you need to use it at the command line, just as you use ANY OTHER FUNCTION.
So execute a line like this at the commandline:
S = myfirstmatlab(10);

更多回答（1 个）

Thorsten
Thorsten 2016-8-5
编辑：Thorsten 2016-8-5
You have to call the function with an argument n:
>> myfirstmatlab(4)
Note that you can write your program in a single line
S = sum(1:n);

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