numberUtils.js

/* Utility functions related to numbers */

function isInt(value) {
  return !isNaN(value) && (function(x) { return (x | 0) === x; })(parseFloat(value))
}

function isFloat(n){
    return Number(n) === n && n % 1 !== 0;
}

function isNumeric(value) {
  return !isNaN(parseFloat(value)) && isFinite(value);
}

function numericValidator(value) {
	if (value) {
		if (! /\D/.test(value)) {
			return true;
		} else {
			return false;
		}
	} else {
		return false;
	}
}

//return true if the number is odd
function isOdd(num) {
  return num % 2 != 0;
}

// return true if the number is even
function isEven(num){
  return num % 2 == 0;
}

// return true if the number is prime
function isPrime(num){
  if (! num || ! isNumeric(num)) {
    return false;
  if(num==2) 
    return true;
  for(i=2;i<Math.sqrt(num);i++) {
    if(num % i==0) 
      return false; // otherwise it's a prime no.
  }
  return true;
}
	
	
function getRandomNumber() {
	//generates 8 digit random integer as string
	return Math.floor((Math.random() * 100000000) + 9999999).toString();
}