Exercise 1

gistfile1.txt

function firstLetter(name) {
  if (typeof(name) !== "string" || name.length < 3) return "Incorrect Input"
  const removedLetter = name.slice(0, -1)
  const result = name[0].toUpperCase() + removedLetter.slice(1)
  return result
}

console.log('firstLetter', firstLetter('Obito'))

On Line 2, I am checking the user argument, if the argument is not a string or the argument is less than 3 characters, its a bad argument so I immediately return an error mesaage and stop the function from executing further.

On Line 3, I removed letter and assign it to a new variable

On line 4, I took the first letter and changed it to uppercase then added it to a sliced function excluding the first

Thank you Sir.

Welcome