JAVASCRIPT

javascript is number an integer

Number.isInteger(value)

//returns a Boolean

integer check in javascript

var a=Number.isInteger(5); //True
var b= Number.isInteger(01); //True
var c=Number.isInteger("10"); //False

console.log(a,b,c);  //true true false

js check if string is integer

function isInt(str) {
  return !isNaN(str) && Number.isInteger(parseFloat(str));
}

javascript check if number is integer

const int = 10;
const float = 10.5;

console.log(Number.isInteger(int)); // true
console.log(Number.isInteger(float)); // false

// Explanation
// The Number.isInteger() method returns true 
// if a value is an integer of the datatype Number. 
// Otherwise it returns false 
// Source: https://www.w3schools.com/jsref/jsref_isinteger.asp

javascript check if variable is number

function isNumber(n) {
  return !isNaN(parseFloat(n)) && !isNaN(n - 0);
}

how would you check if a number is an integer in javascript

console.log(Number.isInteger(9.5)) // false

how would you check if a number is an integer in javascript

function isInt(num) {
  return num % 1 === 0;
}
console.log(isInt(4)); // true
console.log(isInt(12.2)); // false
console.log(isInt(0.3)); // false