![\begin{tikzpicture}[node distance=1.5cm,auto]\setlength \baselineskip{1ex}
\node [input,name=input] {};
\node [decision, below of=input] (decision) {condition?};
\node [block, below of=decision] (code) {block code};
\node [cir,below of=code] (sum) {};
\node [output,below of=sum,name=output] {};
\path [line] (input) --(decision);
\path [line] (decision) -- node[right]{true}(code);
\path [line] (decision.east) -\vert node[right] {false} ($(decision.east) + (1.5,0)$) \vert- (sum.east);
\path [line] (code) \vert- node[]{} ($(code.west)+(-1.5,-1)$) \vert-(decision.west);
\path [line] (sum) -- (output);
\end{tikzpicture}](img9.png)
while(condition)
{
statement(s);
}
#include <stdio.h>
int main ()
{
/* local variable definition */
int a = 10;
/* while loop execution */
while( a < 20 )
{
printf("value of a: %d\n", a);
a++;
}
return 0;
}