DO and END – Block and Loop commands
Use the DO and END commands
to designate a block of code to run together. You can either use them
to group multiple commands for IF-THEN-ELSE or
to repeat blocks of code.
The following list shows the variants of the
DO commands:Block- A single run block of code:
DO Repeat- A simple repeating block:
DO x Iterative- A block that increments or decrements a variable:
DO v = x TO y BY z While- A block that runs only while a condition is true:
DO WHILE expression Until- A block that runs until a condition is true:
DO UNTIL expression Forever- A block that runs until
LEAVEEXITis run.