In the diagram, what is the value of $y$? [asy]
draw((5,0)--(0,0)--(0,5));
draw((.5,0)--(.5,.5)--(0,.5));
draw(Arc((0,0),1,90,360),Arrows);
label("$y^\circ$",(-1,-1),SW);
[/asy]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
In the diagram, what is the value of $y$? [asy]
draw((5,0)--(0,0)--(0,5));
draw((.5,0)--(.5,.5)--(0,.5));
draw(Arc((0,0),1,90,360),Arrows);
label("$y^\circ$",(-1,-1),SW);
[/asy]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
270
In the diagram, what is the value of $y$? [asy]
draw((5,0)--(0,0)--(0,5));
draw((.5,0)--(.5,.5)--(0,.5));
draw(Arc((0,0),1,90,360),Arrows);
label("$y^\circ$",(-1,-1),SW);
[/asy]
train