An object is in "such state" functions

[Michaelh818]

An object is in "such state" functions:

1. Come in the form of questions we can answer yes or no to. Like is the integer prime?, is the string a palindrome?, etc.

function isPrime(num) {
    for ( var i = 2; i < num; i++ ) {
      if ( num % i === 0 ) {
        return false;
      }
    }
    return true;
  }

function isPalindrome(str) {
  var strR =str.split("").reverse().join("");
  return strR === str;
}