How to make sure that when they are asked to enter a name, and the user enters a number, an error message pops up?

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Monti12018-03-06 17:31:20

Java

Monti1, 2018-03-06 17:31:20

How to make sure that when they are asked to enter a name, and the user enters a number, an error message pops up?

What operators to apply to check the above described issue?

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Sergey Gornostaev, 2018-03-06
@Monti1

It depends on who asks and where he introduces.

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