loop statements

Scripts support loop statements. The possible syntax is:

DO WHILE expr statements LOOP

DO UNTIL expr statements LOOP

DO statements LOOP WHILE expr

DO statement LOOP UNTIL expr

Statements will be executed WHILE expr is true, or UNTIL expr is true. if expr is before statements, then the control condition will be tested before iteration. Otherwise, control condition will be tested after iteration.

Examples:

DO

  K = I mod J

  I = J

  J = K

LOOP UNTIL J = 0

 

DO UNTIL I >= 0

  (**Some code here**)

LOOP

 

DO

  K = I mod J

  I = J

  J = K

LOOP WHILE J <> 0

 

DO WHILE I < 0

(**Some code here**)

LOOP