Answers for "typescript check if number is integer"

typescript check if string is number

let numberToCheck: string = "40";

if(!isNaN(Number(numberToCheck))) {
	console.log("string is a number")
}
else {
	console.log("string is NOT a number")
}

javascript check if variable is number

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