JSFiddle - React, Tailwind, and code Playground

by JinHan Heo

JavaScript

for(var j=0; j<10; j++) {
  console.log('j', j)
}
console.log('after loop j is ', j) // after loop j is 10

function counter () {
  for(var i=0; i<10; i++) {
    console.log(i)
  }
}
counter()
console.log('after loop', i) // i is not defined