- A case_expression cannot include relational operators such as < or > for comparison against the switch_expression. To test for inequality, use if, elseif, else statements.
Switch Case or if-else?
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Hello,
I'm writing a script which calculates a value of "R" which is then compared to several inequality limits. The limits are:
R <= 1.2
1.2 < R <= 1.45
1.45 < R <= 1.66
1.66 < R <= 1.93
R > 1.93
Once R satisfies the conditional statement a subroutine is prompted and 1 of 5 subsequent scripts is run.
Is switch case or if-else better for this?
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采纳的回答
Atsushi Ueno
2021-5-21
Switch statement cannot judge the range of R. It may be possible but it must be very tricky.
if (R <= 1.2)
disp('if-else condition 1');
elseif (R <= 1.45)
disp('if-else condition 2');
elseif (R <= 1.66)
disp('if-else condition 3');
elseif (R <= 1.93)
disp('if-else condition 4');
else % R > 1.93
disp('if-else condition 5');
end
I would use this method.
index = find(R <= [1.2 1.45 1.66 1.93 inf], 1, 'first');
disp(['if-else condition ' num2str(index)]);
4 个评论
Atsushi Ueno
2021-5-21
Thank you.
I don't know what script you are writing is. Is it MATLAB function? or other language script?
Please show something about what you are writing, at least interface...
更多回答(2 个)
Dyuman Joshi
2021-5-21
if-else would be better in this case because you have a range of values of R (a variable).
switch is useful when you have descrete values of a variable.
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Stephen23
2023-7-18
"Switch statement cannot judge the range of R. It may be possible but it must be very tricky."
switch true
case R <= 1.2
disp('condition 1');
case R <= 1.45
disp('condition 2');
case R <= 1.66
disp('condition 3');
case R <= 1.93
disp('condition 4');
otherwise % R > 1.93
disp('condition 5');
end
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