BUILT-IN MATHEMATICA SYMBOL
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:
If you forget a semicolon in a program you may see output with Null in it:
This is because the whitespace is interpreted as multiplication. Redefine with a semicolon:
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