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  • Null is a symbol used to indicate the absence of an expression or a result. When it appears as an output expression, no output is printed.
  • ; ; ... ; ; returns Null, and prints no output.
  • Expressions like f [ ,, ] are interpreted to have Null between each pair of adjacent commas.

    Further Examples

    By placing the semicolon at the end of the FactorInteger expression, the computation is performed but the result is not printed.