Source : React Native Check Value Is Number Or Not Using isNaN() Validation
This tutorial explains how to check value is a number or not a number using isNaN() function in react native application. The function isNaN() is used to check the value of any variable or state is a number or not. In this example we will check input is a number or not.
To Check Value is a Number or Not :
isNaN(Pass the Value to check); //It will return true if not a number else false
Note : If the value do not contain the number then it will return True and if the value contain number value then it will return us False.
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