JSFiddle - React, Tailwind, and code Playground

by dmitri_pavlutin

JavaScript

function sum(a, b) {
  var myString;             // moved to the top
  console.log(myString);    // => undefined
  myString = 'Hello World'; // remains
  console.log(myString);    // => 'Hello World'
  return a + b;
}

console.log(sum(16, 10)); // => 26