Skipping input prompt before loop
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I am new to this, so Im sorry if this is an excessively mundane question, but Im just a little confused. I have a script I need to execute with a user-defined starting number, but matlab skips my input prompt entirely and then errors, presumably because there's no set value for my variable because I intended for it to be defined in the prompt.
x=input('Choose positive number')
while x>1;
if rem(x,2)=0
x/2=x;
elseif rem(x,2)=1
3x+1=x;
end
end
Why does matlab skip my input prompt here?
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Answers (3)
Azzi Abdelmalek
on 22 Feb 2014
First error: if rem(x,2)=0 (use ==)
second error: x/2=x; what is this?
0 Comments
Jan
on 22 Feb 2014
Edited: Jan
on 22 Feb 2014
The code is almost correct:
x = input('Choose positive number')
while x > 1
if rem(x,2) == 0 % Compare with "=="
x = x / 2; % Move assigned variable to the left
else % Not needed: if rem(x,2)=1
x = 3*x + 1; % "3x" is not recognized as multiplication
end
end
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Kyle
on 22 Feb 2014
Edited: Kyle
on 22 Feb 2014
2 Comments
Image Analyst
on 22 Feb 2014
A steep learning curve is great and very much desired. If you plot "amount learned" as a function of time, don't you want a very steep curve? It's good that you have a steep learning curve with MATLAB.
Jan
on 22 Feb 2014
@Kyle: Please post comments to answers in the corresponding comment section, not as a new answer.
The assignment operator = assigns the result of the expression on the right side to the variable on the left side. Therefore x/2=x is not valid, because there is an expression on the left side.
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