Null object: Difference between revisions
→{{header|Mathematica}}
Line 222:
FullForm[x]
</lang>
Both set x to be Null. To specifically test is something is Null one can use the SameQ function (with infix operator: ===):
<lang Mathematica>
SameQ[x,Null]
Or equivalent:
x===Null
</lang>
will give back True if and only if x is assigned to be Null. If x is empty (nothing assigned) this will return False.
| |||