Is String a Number?

Elementary

Sie erhalten eine Zeichenkette. Ihre Funktion sollte True zurückgeben, wenn der String eine gültige Zahl ist (nur Ziffern enthält), andernfalls - False . Sehen Sie sich das Beispiel an.

example

Eingabe: Eine Zeichenkette.

Ausgabe: Ein boolescher Wert.

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numbers
string

by:

freeman_lex

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