Convert characters of a string to opposite case in MATLAB

Write a MATLAB code to convert  characters of a string to opposite case

example:

Input: Satadru Mukherjee

Output: sATADRU mUKHERJEE


Code:

x=input('Enter the name:');

q=double(x);

for i=1:length(q)

    if(q(i)>=65 && q(i)<=90)

        q(i)=q(i)+32;

    elseif(q(i)>=97 && q(i)<=122)

        q(i)=q(i)-32;

    end

end

a=char(q)

Output:

Explanation: