if condition equal many variables

Question

AA 2015-3-15

0
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https://ww2.mathworks.cn/matlabcentral/answers/183281-if-condition-equal-many-variables

评论： Image Analyst 2015-3-15

If 6==6==6
c=1
Else
c=0
end

When i type the above code i get c=0 but logically i should get c=6 As 6 is equal to 6. Where is my error and how could i rewrite the code?

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Answer 1

Roger Stafford 2015-3-15

1
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You should realize that "6==6==6" is operated on as:

(6==6)==6

The (6==6) will give a true result, and which in combination with the third 6 will be converted to a numerical 1. Then you have 1==6 which is false. You will always get a false result with c = 0 as a result. In other words 6==6==6 is definitely false in the matlab world. Advice: don't use it! What were you trying to achieve?