While Loop
while('condition','body') - Repeats 'body' while 'condition' is true.
Advice: Choose it from the Programming palette
Important note: Inside the 'body' (line block could be used) the 'condition' must change from true (different than zero) to false (zero) otherwise we can have the endless (never ending) loop. The only way in this case for while or for loop is to interrupt the calculation by choosing

As a general rule, if the calculation is too long, double-check your loops.
Here is a simple example of using while loop:

This page is based on a legacy wiki article by Radovan Omorjan.