Is String a Number? (Part II)

Elementary+

Sie erhalten eine Zeichenkette. Ihre Funktion sollte Folgendes zurückgeben True zurückgeben, wenn die Zeichenkette eine gültige Zahl ist (die nur Ziffern und "+-." an den richtigen Stellen enthält), andernfalls - False. Sehen Sie sich die Maske an:

[+- ][zero or more digits][.][zero or more digits]

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numbers
string

by:

freeman_lex

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