# Build an array of square and square root of user input

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Mina on 4 Jun 2021
Edited: David Fletcher on 4 Jun 2021
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.
Mina on 4 Jun 2021
I'm not sure how to display the outputs as an array

David Fletcher on 4 Jun 2021
Edited: David Fletcher on 4 Jun 2021
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);