I am not getting a new line in MATLAB when using fprintf function

I am very new to MATLAB and coding in general, and will try my best to ask clearly. I believe it's a simple solution to a simple problem. I wrote a small function for the pyhtagorean value:

function c = pyth(a,b)
%Takes two inputs of same size and returns the pythagorean of the 2 inputs
if size(a) == size(b) %checks for same size
    c = sqrt(a.*a + b.*b);  %calculates the pythagorean value
else
    fprintf('Error: Input sizes are not equal'); %returns if sizes are not the same
end

It works correctly, but after it returns, the '>>' is on the same line as my output, rather than a fresh line beneath the output. This is only the case for the fprintf. Here:

>> pyth([1 2;3 4],[5 6;7 8])
ans =
    5.0990    6.3246
    7.6158    8.9443
>>

>> pyth([1 2],[1 2;3 4])
Error: Input sizes are not equal>> 

Does anyone know the quick fix to this? Thanks