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MSPValueQ
See Also
MSPValue
MSPValue
[
var
]
returns the value of
var
; it returns a null string if
var
has no value
MSPValue
[
var
,
def
]
returns the value of
var
; it returns
def
if
var
has no value
MORE INFORMATION
MSPValue
is a utility function that is useful for extracting the value of variables.
The following exceptions can be thrown by
MSPValue
.
MSPException["ValueError"]
if the value is not a string, this indicates a programmatic error by the page author
MSPException["VariableError"]
if the variable is not a
Mathematica
symbol, this indicates a programmatic error by the page author
EXAMPLES
CLOSE ALL
Basic Examples
(1)
You can simulate how the functions work by loading the package.
The value of the variable
$$expr
is returned.
In[1]:=
Out[1]=
If
$$expr
has no value, then a null string is returned.
In[2]:=
Out[2]=
Here a default value is returned.
In[3]:=
Out[3]=
SEE ALSO
MSPValueQ
TUTORIALS
web
Mathematica
User Guide
Graphics: Plot.jsp in User Guide
Input Variables in web
Mathematica
User Guide
Mathematica
Web Functions in web
Mathematica
User Guide
EXAMPLES
Basic Examples 
