Javascript_Functions_'Currency Converter' Code Project

Question

Hello. I'm doing the final project in the Functions Sections of the JavaScript Tutorial.
I don't understand how the predetermined code starts.
It begins like this:

"function main() {
var amount = parseFloat(readLine(), 10);
var rate = parseFloat(readLine(), 10);"

What is parseFloat? What is readLine? Why is that there? I can't find those concepts explained elsewhere.

Also, at the end, it says:

" console.log(convert(amount, rate));"

What does "convert" refer to?

Answer 1

parseFloat is used to convert a string into a floating-point number