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Giovanni Thomas
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Asked: 2022-05-21T18:28:28+00:00 In:

How to check if number is a whole number in javascript?

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I want to check if number is a whole number in javascript but I am still a novice at Javascript, your suggestions would be much appreciated. Thank you.

♦ Suggestions of ITtutoria Team
Using javascript, you can check if a number is a whole number. The code below checks whether or not the value of the variable x is an integer.

Here is a case study for you

// The Number.isInteger() checks to see if the passed value is an integer
// Returns true or false
​
Number.isInteger(2); //True
Number.isInteger(90); //True
Number.isInteger("37"); //False
Number.isInteger(false); //false
whole number
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1 Answer

  1. function hasDecimal (num) {
 return !!(num % 1);
}
hasDecimal(2) // true
hasDecimal(2.345) // false
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