Count Letters in a String Using Ruby

Here is a simple program to ask the user to give a string and then the program will ask the user what letter to be counted in the given string. The program will count the number of occurrence of the given string using Ruby programming language.

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Sample Program Output

Program Listing

count_letter.rb

# count_letter.rb

# Author   : Jake Rodriguez Pomperada,BSCS,MAED-IT

# Date     : July 9, 2019   Tuesday  12:49 PM

# Address  : Bacolod City, Negros Occidental

# Tools    : Eclipse IDE and Ruby Version 2.6.3

# Location : Bacolod City, Negros Occidental  

# Website  : http://www.jakerpomperada.com

# Emails   : jakerpomperada@gmail.com and jakerpomperada@yahoo.com

loop do

  print "\n\n"

  print "\t===== Count Letters in a String ====="

  print "\n\n"

  print "\tGive a String : "

  str_val = gets.chomp

  print "\n"

  print "\tWhat letter to be count ? : "

  letter_val = gets.chomp

    display = str_val.downcase.count(letter_val)

    display_str = str_val.upcase

    display_letter = letter_val.upcase

    print "\n"

    print "\tThe given string is #{display_str}."

    print "\n\n"

    print "\tThe number of occurrence of the letter" 

    print " #{display_letter} is #{display}."

    puts "\n\n";

    print "\tDo you want to continue? (y/n) : "

    answer = gets.chomp.downcase

    if answer == "n"

   print "\n\n";

      print "\tEnd of Program";

      print "\n\n";

   break

    end

  end