find the kth index of a character in a string in ruby

You can find the kth index of a character in a string in Ruby by using the [] (indexing) operator with the k-1 as the index.

Here's an example:

main.rb
str = "Hello, World!"
k = 3 # We want to find the index of the 3rd character, which is 'l'

index_of_kth_char = str[k-1]

puts index_of_kth_char # Output: "l"
159 chars
7 lines

In this example, we have a string "Hello, World!" and we want to find the index of the 3rd character, which is 'l'.

We assign the value 3 to k and use it as the index for the [] operator. However, since the indexing in Ruby starts with 0, we need to subtract 1 from k to get the correct index.

Finally, we assign the value of the kth character in str to the variable index_of_kth_char and output it.