Entry Level Exam Question
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What does the following code display?
V=[2 4 6 8];
for V = 1:2:5
if V>=3
disp('yes')
else
disp('no')
end
end
disp(V);
I know the output is:
no
yes
yes
5
But I'm not sure why. What determines the yes and no answers, and why does the value of V become 5? Any help?
1 个评论
phillip kataswa
2020-3-31
The last number to iterate thorough the loop is 5. I think that instead of displaying the whole vector V
V is automatically changed to a scaler vector and only stores the last number that iterates through the loop.
回答（2 个）
Image Analyst
2013-3-7
编辑：Image Analyst
2013-3-7
The first V you made is essentially thrown away and never used.
V=[2 4 6 8]; % Never used at all.
When you do this:
for V = 1:2:5
you're saying that, in the loop, you want V to take on values 1, 3, and 5. It means (startvalue):(stepValue):(endingValue). After the loop, V retains its last value of 5 and that's what you print out.
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2020-3-31
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