robyurkowski · September 29, 2011 19:17
diff --git a/PrimeNoV2.rb b/PrimeNoV2.rb
 #retrive a number between 1 and another value - varUpper

 # R: In Ruby, we strive for legibility. varUpper is an okay variable name, but an even better one would be upper_limit (var is implied by the fact it's a var, and Upper isn't clear as to what it refers).
 upper_limit = 100

 # R: This is one way to do a string, with single quotes. There are also a couple of alternatives, but the primary one is this:
 # Double quotes let you put variables in a string in between #{} -- this will also automatically call .to_s.
 puts "Welcome to Keith's Prime Number Checker. Please enter an integer between one and #{upper_limit}"

 # R: We'll name this something more verbose, too:
 potential_prime = gets.chomp.to_i

 if (potential_prime <= upper_limit) and (potential_prime > 1)
  # R: Ruby uses two spaces instead of tabs.
  puts 'Thank you. The number you have entered is ' + varTest.to_s + '.'
 else
  while (potential_prime > upper_limit) or (potential_prime <= 1)
    puts 'The number you have entered is not valid. Please enter another number.'
    potential_prime = gets.chomp.to_i
  end
 end

 puts potential_prime.to_s + ' will now be checked to see if it is a prime.'

 #test

 divisor = 2
 mod_result = 1
 is_prime = true

 # R: From 2 up to potential prime / 2 + 1, do as i...
 divisor.upto(potential_prime / 2 + 1) do |i|
  is_prime = false if (potential_prime % i == 0)
 end

 if is_prime
  puts "Congratulations! #{potential_prime} is a prime number!"
 else
  puts "Test completed. #{potential_prime} is not a prime number."
 end
	#retrive a number between 1 and another value - varUpper

	# R: In Ruby, we strive for legibility. varUpper is an okay variable name, but an even better one would be upper_limit (var is implied by the fact it's a var, and Upper isn't clear as to what it refers).
	upper_limit = 100

	# R: This is one way to do a string, with single quotes. There are also a couple of alternatives, but the primary one is this:
	# Double quotes let you put variables in a string in between #{} -- this will also automatically call .to_s.
	puts "Welcome to Keith's Prime Number Checker. Please enter an integer between one and #{upper_limit}"

	# R: We'll name this something more verbose, too:
	potential_prime = gets.chomp.to_i

	if (potential_prime <= upper_limit) and (potential_prime > 1)
	# R: Ruby uses two spaces instead of tabs.
	puts 'Thank you. The number you have entered is ' + varTest.to_s + '.'
	else
	while (potential_prime > upper_limit) or (potential_prime <= 1)
	puts 'The number you have entered is not valid. Please enter another number.'
	potential_prime = gets.chomp.to_i
	end
	end

	puts potential_prime.to_s + ' will now be checked to see if it is a prime.'

	#test

	divisor = 2
	mod_result = 1
	is_prime = true

	# R: From 2 up to potential prime / 2 + 1, do as i...
	divisor.upto(potential_prime / 2 + 1) do \|i\|
	is_prime = false if (potential_prime % i == 0)
	end

	if is_prime
	puts "Congratulations! #{potential_prime} is a prime number!"
	else
	puts "Test completed. #{potential_prime} is not a prime number."
	end