if ( boolean_expressions )
{
   // do soemthing
}


if ( boolean_expressions )
{
  // do something
}
else
{
   // do something else
}


while ( boolean_expression )
{
  // do something
}


while ( boolean_expression )
{
  // do something
}
finally  // not in Java or C++ or JavaScript
{
   // do something else
}


initialize
while ( test )
{
   // do something
   increment
}



for ( initialize ; test ; increment )
{
   // do something
}


for (; test ;)  // a while-loop
{
   // do something
}


for (;;) // an infinite loop
{
   // do something
}