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Stephen Wolfram
SEARCH MATHEMATICA 8 DOCUMENTATION
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE
DOCUMENTATION CENTER
FOR THE LATEST INFORMATION.
Mathematica
>
Testing Expressions
>
Built-in
Mathematica
Symbol
Negative
NonNegative
Sign
Greater
Simplify
Assumptions
See Also »
|
Testing Expressions
More About »
Positive
Positive
[
x
]
gives
True
if
x
is a positive number.
MORE INFORMATION
Positive
[
x
]
gives
False
if
x
is manifestly a negative numerical quantity, a complex numerical quantity, or zero. Otherwise, it remains unevaluated.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
Evaluate different types of numbers:
In[1]:=
Out[1]=
Quantities that are not
NumericQ
remain unevaluated:
In[2]:=
Out[2]=
SEE ALSO
Negative
NonNegative
Sign
Greater
Simplify
Assumptions
MORE ABOUT
Testing Expressions
New in 1
© 2013 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
