find the kth character in a string in ruby

To find the kth character in a string in Ruby, you can use indexing with the k-1 as the index. Here's an example:

main.rb
str = "hello world"
k = 3
puts str[k-1] #=> "l"
48 chars
4 lines

In this code snippet, we define a string "hello world" and a variable k which is the position of the character we want to find (in this case, the third character). We then use indexing with k-1 as the index to get the kth character in the string which is "l".

It's important to note that strings in Ruby are 0-indexed, meaning the first character has an index of 0, so we subtract 1 from k to get the correct index.