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NumericQ::set

Details

  • This message is generated when the argument in NumericQ on the left side of an assignment is not a symbol, or the expression on the right side is not True or False.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NumericQ::set].

Examples

Basic Examples  (1)

An error occurs because the right side of this assignment is not True or False:

Wolfram Language code: NumericQ[test] = Sqrt[2]

These inputs set a numerical value for the test symbol and specify that the test symbol is a numeric quantity:

Wolfram Language code: N[test] = Sqrt[2]
Wolfram Language code: NumericQ[test] = True

The test symbol now has a numerical value and will be treated as a numeric quantity:

Wolfram Language code: N[test]
Wolfram Language code: NumericQ[Cos[test]]

Remove the changes to the test symbol:

Wolfram Language code: ClearAll[test];NumericQ[test]=.