do
statement(s)
until booleanexpression
Execute the statement(s) inside the do loop whil the booleanexpression evaluates to false. Do / Until executes the statements one or more times. The test is done after each time the code in the loop is executed.
Call, Do / Until, End, For / Next, Function, Global, Goto, Gosub, If / Then, Pause, Ref, Rem, Return, Subroutine, While / End While
t = 1 do print t t = t + 1 until t > 5
will print
1 2 3 4 5
0.9.4g