Write a JavaScript function to validate whether a given value is a number or not

Question

Apu October 06, 2022 › #Function › #HowTo

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Write a JavaScript function to validate whether a given value is a number or not

In this article, we will write a JavaScript function to validate whether a given value is a number or not.

To validate a value, is a number or not , we will use the isNaN() method.


 Demo : check if character is a number. #
  function myFunction(e){
  if(!isNaN(e)){
    return 'Yes, this is a number'
  }
  else{
    return 'No, this is not a number'
  }
}
 Try it Yourself »

The isNaN() method returns true if the value is not a number. If the value is a number , it returns false.


 Example : isNaN() method. #
 Try it Yourself »

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Apu · Accepted Answer · 2022-10-06T19:42:27+05:30

In this article, we will write a JavaScript function to validate whether a given value is…