Updated # 1. forEach

[Eronred]

while reading, realized that "index" is spelled as "i" in console.log

const countries = ['Finland', 'Estonia', 'Sweden', 'Norway']
countries.forEach(function (country, index, arr) {
  console.log(i, country.toUpperCase())
})

to....

...
countries.forEach(function (country, index, arr) {
  console.log(index, country.toUpperCase())
})