It will be a memo for learning
Since two integers separated by spaces and a character string are input, output a substring of the range of two integers.
Input example 1 2 6 this is a pen Output example 1 his i
Input example 2 2 6 Welcome to the paiza! I`m studying ruby! Output example 2 elcom
nums = gets.chomp.split(" ") str = gets.chomp.split("") for i in (nums.to_i - 1)..(nums.to_i - 1) print str[i] end
nums = gets.chomp.split(" ") str = gets.chomp.split("")
Nums is the output range, and
str is the character string decomposed and assigned to the input numbers and character strings.
gets method: Receives input as a "character string" line by line. chomp method: Removes line breaks in character strings. split method: Splits a character string into an array.
for i in (nums.to_i - 1)..(nums.to_i - 1)
Convert the range from
nums  to
nums  to an integer with the for statement and assign it to the i variable.
Output the range of i variables in the string of str
I would appreciate it if you could point out any mistakes.