JSFiddle - React, Tailwind, and code Playground

JavaScript

(function(){

  var a, c; // Not global, but available to all three functions

  function new1(){
    a = 5;
  }

  function new2(){
    c=6;
  }

  function new3(){
    if(a < c){
      doSomething();
    }
  }

  new1();
  new2();
  new3();

})();

function doSomething(){
  console.log("Doing something");
}

console.log(typeof a);