Build an array of square and square root of user input

The aim of this project is to build an array depending on a number from 1 to 10 entered by the user.

From 1 to num, all multiples of 2 should be squared and for all other numbers, the element should be square rooted.

Build the array sqr as the square or square-root (see story above) of all the numbers from 1 to the number entered by the user.

Display the array you built.

[Steven Lord]

This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the MATLAB Onramp tutorial (https://www.mathworks.com/support/learn-with-matlab-tutorials.html) to quickly learn the essentials of MATLAB.

If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.

[Mina]

num = input('Please enter your favourite number between 1 and 10: ');

while num < 1 || num > 10

num = input('Invalid input. Please enter your favourite number between 1 and 10: ');

end

sqr = 1:num;

for i = 1:num

if mod(i,2) == 0

sqr = i.^2;

else

sqr = sqrt(i);

end

fprintf ('%6.4f \n', sqr);

end

[Bob Thompson]

What is the specific problem you're having with the code? This seemed to work for me.

[Mina]

I'm not sure how to display the outputs as an array

Answer 1

[David Fletcher]

The code you have written largely does what is asked, the only thing that is missing is that you are throwing the calculated sqr value away on each iteration of the loop rather than building an array from the values. You just need to save the values into the sqr vector by using the loop iterator to index into the vector. I suppose if you are being pedantic, the question asks you to display the array that has been built wheras you are displaying each value separately as it is calculated, but I think you've demonstated you can easily remedy that yourself.

clear
num = input('Please enter your favourite number between 1 and 10: ');
while num < 1 || num > 10
    num = input('Invalid input. Please enter your favourite number between 1 and 10: ');
end
sqr = 1:num;
for i = 1:num
    if mod(i,2) == 0
        sqr(i) = i.^2;
    else
        sqr(i) = sqrt(i);
    end
    fprintf ('%6.4f \n', sqr(i));
end

disp(sqr);