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\begin{tikzpicture}[->,>=stealth',shorten >=1pt,auto,node distance=4cm,
                thick,main node/.style={circle,draw,font=\Large\bfseries}]

  \node[main node] (1) {1};
  \node[main node] (2) [below left of=1] {2};
  \node[main node] (3) [below right of=1] {3};

    (1) edge [loop above] node {0.6} (1)
        edge [bend right] node {0.4} (2)
    (2) edge node [below]{1.0} (1)
    (3) edge [loop below] node {0.8} (3)
        edge node[right] {0.1} (1)
        edge node[below] {0.1} (2);      


What I want is loop with 0.8 to be placed as I drawn in red (something between right and below option).
How can I do that?
I tried (3) edge [loop below right] node {0.8} (3) and it didn't work.

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I find this good also [node loop with angle][1] [1]: tex.stackexchange.com/questions/20259/… – Wassim Sboui Jun 17 '12 at 20:26
up vote 19 down vote accepted

For example, specifying angles for in and out:

\draw (3) to [out=330,in=300,looseness=8] (3);


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In tkz-graph, the loop is placed with dir=SOEA south east


enter image description here


\begin{tikzpicture}[->,>=stealth',shorten >=1pt,thick]
\tikzset{VertexStyle/.style = {draw,circle,thick,
                               minimum size=1cm,
\Vertex{1} \SOWE(1){2} \SOEA(1){3} 
\Edges(3,2,1) \Edge(3)(1)

\Loop[dist=2cm,dir=SOEA,label=$0.8$,labelstyle=below right](3)  

\path[every node/.style={swap,auto}]    (2) to node {0.1} (1)
                                            to node {0.1} (3)
                                            to node {0.1} (2); 
\draw[->] (1) to [bend right] node [above left] {0.4} (2);
% it's possible with \Edge but Tikz's syntax is allowed too.
share|improve this answer

If, like me, you want to add text above the loop created with Stefan Kottwitz's solution and you struggle doing so using \draw, here's what you could do using \path:

\path (3) edge [out=330,in=300,looseness=8] node[above] {0.8} (3);
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