JAVASCRIPT

javascript is number an integer

Number.isInteger(value)

//returns a Boolean

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

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

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

javascript is int

let testString="5";

if(Number.isInteger(parseFloat(testString))){
 console.log("we are a int of some sort");                             
}    

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

js is variable int

// The === operator is used for checking
// the value and the type of a variable

var data = 1;

if (data === parseInt(data, 10))
    alert("data is integer")
else
    alert("data is not an integer")