check the data is number or not?

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akshatha nayak
akshatha nayak am 7 Mai 2019
Beantwortet: KSSV am 7 Mai 2019
when data entered in GUI i need to check whether the enetered data is number or not. If it is not a number i need to print error msg.

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KSSV
KSSV am 7 Mai 2019
a = rand(3) ;
isnumeric(a)

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