Using switch to identify even or dd
168 views (last 30 days)
Show older comments
Problem in brief: Print “Odd” if the argument is 1, 3, or 5, “Even” if the argument is 0, 2, or 4, and “Let me get back to you on that one.” for any other value.
function [y] = even_odd(x)
r = mod(x,2);
switch x
case x<=4 && r ==0
fprintf('even \n')
case x<=5 && r == 1
fprintf('odd \n')
otherwise
fprintf('i will get back to you on that \n')
end
end
I dont understand why this function doesn't give the correct response. Please provide insights.
2 Comments
MJFcoNaN
on 20 Jul 2022
Hello,
I will suggest you learn the basic programma of Matlab firstly. There may be significant discrepancy between languages.
Accepted Answer
Walter Roberson
on 20 Jul 2022
Edited: Walter Roberson
on 20 Jul 2022
even_odd(-88)
even_odd(2)
even_odd(3)
even_odd(7)
function [y] = even_odd(x)
r = mod(x,2);
switch true
case x<=4 && r ==0
fprintf('even \n')
case x<=5 && r == 1
fprintf('odd \n')
otherwise
fprintf('i will get back to you on that \n')
end
end
2 Comments
Walter Roberson
on 20 Jul 2022
The value that you list in the switch statement is compared to the value listed in the case. The values in your case are things like x<=4 && r==0 which is a logical expression, so the values in your case are either true or false so you need to switch on one of true, false, 0, or 1 . You want to select the case that is true, so you have to switch on true
... in practice you do not need that comparison for x inside the switch. You might hypothetically want to test against
fprintf('%ld\n', flintmax)
which is the largest double precision integer that can be reliably tested for division by 2.
More Answers (2)
KSSV
on 20 Jul 2022
You have only two options x can be either even or odd..that's all.
x = 4 ;
r = mod(x,2);
if r == 0
fprintf('%d is Even\n',x)
else
fprintf('%d is Odd\n',x)
end
2 Comments
KSSV
on 20 Jul 2022
x = 5 ;
r = mod(x,2);
switch r
case 1
fprintf('%d is Odd\n',x)
case 0
fprintf('%d is Even\n',x)
end
David Hill
on 20 Jul 2022
function [y] = even_odd(x)
r = mod(x,2);
if x<=4 && r==0
fprintf('even \n')
elseif x<=5 && r==1
fprintf('odd \n')
else
fprintf('i will get back to you on that \n')
end
end
See Also
Categories
Find more on Contour Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!