[NAME]
ALL.dao.control.while

[TITLE]
While Looping Control

[DESCRIPTION]

while is a simple looping construct that executes a block if the looping condition is tr
ue, and repeats the execution as long as the condition is true.

 0.1   Definition  
     
   1  WhileStmt ::= 'while' '(' [ LocalVarDeclaration ';' ] Expression ')' ControlBlock
     

A while loop generally looks like the following: 
     
   1  while( expression ){
   2     block;
   3  }
     
If expression is true, block is executed and repeated  until expression becomes false, na
mely, while expression is true, execute block.

 0.2   Examples  

     
   1  var i = 0;
   2  while( i < 5 ){
   3     io.writeln( i );
   4     i += 1;
   5  }