What statement completes sqRootUserInterface?

function sqRoot $=$ sqRootUserInterface$()$

usrNum $=$ input$(\text{'}$Enter a positive number: $\text{'})$;

; $\%$ Newton's Method

fprintf$(\text{'}$The square root of $\%$f is $\%$f

$\text{'},$ usrNum, sqRoot$)$;

end

function root $=$ NewtonSqrt$($ x $)$

$\%$ Calculate approximate square root

$\%$ using Newton's method $($code not shown$)$

end