while -- loop control

while -- loop control

while p do x -- repeatedly evaluates x as long as the value of p remains true, returning null.
while p list x -- repeatedly evaluates x as long as the value of p remains true, returning a list of the values of x encountered.
while p list x do z -- repeatedly evaluates x and z as long as the value of p remains true, returning a list of the values of x encountered.

See also:

loops -- evaluate code repeatedly

break -- break from a loop

for -- loop control