# Asymptote: Labeling

(Redirected from Asymptote:Labeling)

Let's say you have a point that you want to label, for example, Point A.

This is extremely simple. First, draw a dot.

dot((0,0));

$[asy] dot((0,0)); [/asy]$

Now we use the label command.

dot((0,0));
label("A",(0,0));


$[asy] dot((0,0)); label("A",(0,0)); [/asy]$

However, it is likely that this is not what you want your point to look like. We now fix an attribute to this label:

dot((0,0));
label("A",(0,0),S);


$[asy] dot((0,0)); label("A",(0,0),S); [/asy]$

The location of the label could also be changed.

dot((0,0));
label("A",(0,0),N);


$[asy] dot((0,0)); label("A",(0,0),N); [/asy]$

In fact, you can use North, West, East, South, Northwest (NW), Southeast (SE), etc etc.

Now, lets get fancy with labeling. Let's say we want to label a length. In this case, we can use $\LaTeX$:

dot((0,0));
dot((1,1));
draw((0,0)--(1,1));
label("The length is $\sqrt{2}$",(0,0)--(1,1),SE);


$[asy] dot((0,0)); dot((1,1)); draw((0,0)--(1,1)); label("The length is \sqrt{2}",(0,0)--(1,1),SE); [/asy]$

Notice that I labeled a line.

Even fancier:

dot((0,0));
dot((1,1));
draw((0,0)--(1,1));
label("The length is $\sqrt{2}$",(0,0)--(1,1),SE,green);


$[asy] dot((0,0)); dot((1,1)); draw((0,0)--(1,1)); label("The length is \sqrt{2}",(0,0)--(1,1),SE,green); [/asy]$