JSFiddle - React, Tailwind, and code Playground

by Sascha

JavaScript

function notPrimes(a,b){
  let primes= [2,3,5,7];
  while (a<b) {
    let valid= true;
    a.toString().split('').map((x) => {
      valid = valid ? primes.indexOf(parseFloat(x)) > -1 : false;
    });
    if (valid) {
      console.log(a + "is a valid number");
    } else {
      console.log(a + " is INVALID");
    }
    a++;
  }
}

notPrimes(2,30);

var imageList = [100,200,300,400,500];
var index = imageList.indexOf(200); // 1

console.log(index);