Example

var { 
    isNumber, 
    isEven, 
    isOdd
    parseInt,
    parseFloat,
    isPrime,
 } = require("./index");

isNumber(value)

isNumber(10); -> true
isNumber("10");  -> true 
isNumber(""); -> false 
isNumber(undefined); -> false
isNumber(null);  -> false
isNumber("abc");  -> false

isEven(value)

isEven(10);  -> true
isEven(9);  -> false
isEven("a12"); ->  false;
isEven(undefined); ->  false;
isEven(null);  ->  false;

isOdd(value)

isOdd(10);  -> false
isOdd(9);  -> true
isOdd("abc");  ->  false;
isOdd(undefined); ->  false;
isOdd(null);  ->  false;

parseInt(value),

parseInt("10.7"); -> 10
parseInt("1a"); -> throw "Input parameter is not a number!";

parseFloat(value)

parseFloat("10.7"); -> 10.7
parseFloat("a"); ->  throw "Input parameter is not a number!";

isPrime(number)

isPrime(10); -> false
isPrime(7); -> true
isPrime("A"); -> false
isPrime(undefined); -> false