Is String a Number? (Part II)

Elementary+

Otrzymują Państwo ciąg znaków. Funkcja powinna zwrócić True jeśli ciąg jest poprawną liczbą (zawiera tylko cyfry i "+-." w odpowiednich miejscach), w przeciwnym razie - False. Proszę spojrzeć na maskę:

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

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numbers
string

by:

freeman_lex

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