1 WHILE
 The WHILE statement marks the beginning of a WHILE loop or  qualifies  the
 execution of another statement.

 Examples

 X = 1
 WHILE X<100
     X = X + SQR(X)
 NEXT

 X% = X% + 1% WHILE X% > 100%

2 Syntax

 Conditional:

     WHILE cond-exp
           [ statement ]...
     NEXT

 Statement Modifier:

     statement WHILE cond-exp