Can anyone explain me this code, especially the loop part!

Question

function titleCase(str) {
let newStr = str.split(' ')
let updateStr = []

for (let i in newStr) {
updateStr[i] = newStr[i][0].toUpperCase() + newStr[i].slice(1).toLowerCase()

}
return updateStr.join(' ')
}

console.log(titleCase("I'm a little tea pot"));

Answer 1

Line 1 The code takes the string,
Line 2 Split the string where there is a space (splits into words), it becomes a list
Line 3 Creates an empty list
Line 4 Loops an through the word list
Line 5 Changes the First letter of each word into Upper Case, and the second to lower case and store in variable updateStr
Line 6 It returns the list. Where the first and second letter are separated by space
Line 7 Prints out the result of the code.

* I hope this helps you understand