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While
While
[
test
,
body
]
evaluates
test
, then
body
, repetitively, until
test
first fails to give
True
.
MORE INFORMATION
While
[
test
]
does the loop with a null body.
If
Break
[]
is generated in the evaluation of
body
, the
While
loop exits.
Continue
[]
exits the evaluation of
body
, and continues the loop.
Unless an explicit
Return
is used, the value returned by
While
is
Null
.
Note that in an example like
i=0;While[i<0, tot+=f[i];i++]
the roles of
;
and
,
are
reversed
relative to C-like programming languages.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
Print and increment
n
while the condition
n
<4
is satisfied:
In[1]:=
Scope
(2)
Generalizations & Extensions
(1)
Applications
(2)
Properties & Relations
(4)
SEE ALSO
Do
For
NestWhile
TakeWhile
LengthWhile
Nest
Fold
Select
Throw
TUTORIALS
Loops and Control Structures
Repetitive Operations
MORE ABOUT
Language Overview
Looping Constructs
Procedural Programming
RELATED LINKS
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(
A New Kind of Science
)
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© 2008 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
Scope 