3rd class

Today we did CodingBat nearHundred, Makes10, missing Char

Fortunately, I understood Makes10 because the question was really simple and clear.

However, I didn't perfectly understand missing Char, which was about the Kitten and the n value.

I mean, what is a char?

and what does a substring do?

I am so confused with those.

I also have a problem with understanding what the hell the question is asking me to do.

For example,

Given a non-empty string and an int n, return a new string where the char at index n has been removed. The value of n will be a valid index of a char in the original string (i.e. n will be in the range 0..str.length()-1 inclusive). missingChar("kitten", 1) → "ktten" missingChar("kitten", 0) → "itten" missingChar("kitten", 4) → "kittn" what is a index n? Well...at least I have a star lol Java > Warmup-1 chance Java > Warmup-1 > sumDouble prev | next | chance Given two int values, return their sum. Unless the two values are the same, then return double their sum. sumDouble(1, 2) → 3 sumDouble(3, 2) → 5 sumDouble(2, 2) → 8 what does return their sum?