![\begin{tikzpicture}[node distance=1.5cm]\setlength \baselineskip{1ex}
\node [input,name=input] {};
\node [block, below of=input] (code) {block code};
\node [decision, below of=code] (decision) {condition?};
\node [cir,below of=decision] (sum) {};
\path [line] (input) -- (code);
\path [line] (code) -- (decision);
\path [line] (decision) -- node[right]{false}(sum);
\path [line] (decision.west) -\vert node[above right] {true} ($(decision.west) + (-1,0)$) \vert- (code.west);
\end{tikzpicture}](img11.png)
do {
statement(s);
}while( condition );
#include <stdio.h>
int main ()
{
/* local variable definition */
int a = 10;
/* do loop execution */
do
{
printf("value of a: %d\n", a);
a = a + 1;
}while( a < 20 );
return 0;
}