BUILT-IN MATHEMATICA SYMBOL
Null
Null
is a symbol used to indicate the absence of an expression or a result. It is not displayed in ordinary output.
When Null appears as a complete output expression, no output is printed.
returns Null, and prints no output. - Expressions like
are interpreted to have Null between each pair of adjacent commas.
- Null represents the absence of content or elements in such constructs as InputField or Grid.
When a sequence of commands ends with a semicolon, no output is shown:
The full form of the output is Null:
Out[2]//FullForm= |
| |  |
If you forget a semicolon in a program you may see output with Null in it:
| Out[2]= |  |
This is because the whitespace is interpreted as multiplication. Redefine with a semicolon:
| Out[4]= |  |
New in 1 | Last modified in 6
