NumberQ

Disponibile

Tests whether an expression is a (literal) numeric value.

Forme

NumberQ[expr]

Esempi verificatiNumberQ[3.5] → True NumberQ["abc"] → False

Esegui su Qurak Cerca nella guida

Argomenti

Atomic Elements Of Expressions - Numbers »
Expressions - Expression Testing »
Patterns - Restrictions on Patterns
Representation Of Numbers - Testing for Types
Testing Expressions - Numerical Properties

Correlate

NumericQ RealValuedNumberQ RealValuedNumericQ IntegerQ MachineNumberQ TrueQ Complexes Assuming Integer Complex IntegerDigits Precision

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