Why legend is missing when I use xline function?

I am trying to use xline function but legend is having problem when I use xline funtion

you can see below code and plot

clear 
x = 1:0.1:10;
y = sin(x);
plot (x,y)
xline(3,'r','example')
legend('why not visble')

[Mathias Andersen]

Might want to see here

As I have no problem with legend on the code you posted

[Jeevan Kumar Bodaballa]

helped a lot

Thank you