How to use the Number.isInteger() method In Javascript
The Number.isInteger() method can also be used to check if a value is number or not. It is mainly used for checking the integer values.
Syntax:
Number.isInteger(testingValue);
Example: The below code explains the use of the Number.isInteger() method to check if a value is number or not.
function isNumber(value){
try{
if(!(Number.isInteger(value))){
throw new Error("Passed value is not a number");
}
console.log("Passed value is a number");
}
catch(error){
console.log("An error occurred: ", error.message);
}
}
isNumber(69);
isNumber("231");
isNumber("Geek");
Output
Passed value is a number An error occurred: Passed value is not a number An error occurred: Passed value is not a number
How to Check if a Value is a Number in JavaScript ?
To check if a value is a number in JavaScript, use the typeof operator to ensure the value’s type is ‘number’. Additionally, functions like Number.isFinite() and !isNaN() can verify if a value is a valid, finite number.
We can use the below methods to check whether the value is a number or not:
Table of Content
- Using the isNaN() method
- Using the typeof operator
- Using the Number.isInteger() method
- Using the Number.isFinite() method