Trouble With Simple 'while' Loop Logical Operator

Question

Dave 2013-1-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/60297-trouble-with-simple-while-loop-logical-operator

Can't seem to get my while loop to execute.

-No error showing

-Getting rid of 1 initial condition in 'while' loop and the script runs (not how I want though). I need my 'while' loop to accept a number between 1 and 12 (corresponds to 1=Jan, 2=Feb, etc).

Any help with this greatly appreciated!

Script Below:

clear all
clc
M = 100;
Y = -100;
disp('After selecting a month and year, the number of days within that month will be displayed.')
while Y<0
Y = input('Please select a year: ');
end
while (M<0) & (M>12)
M = input('Please select a month: ');
end

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Answer 1

James Kerns 2013-1-30

2
链接

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https://ww2.mathworks.cn/matlabcentral/answers/60297-trouble-with-simple-while-loop-logical-operator#answer_72840

在 MATLAB Online 中打开

It would appear you need an OR logical operator in the

while (M<0) & (M>12)

I.e. make it

while (M<0) || (M>12)

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Dave 2013-1-30

Thanks so much! I thought I went through all the logical operators for the sake of debugging but I guess I didn't. Thanks again :)

Jan 2013-1-30

Btw., omit the useless clear all: removing all loaded functions from the memory wastes time only. If you really want to clear the variables, use clear variabels.

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