CODEWITHSUNDEEP
rubywhile-loop
Topa_14
Topa_14

Reputation: 199

Using `while` to repeat the process if user wants to do another operation

I wrote the following code:

puts "Money to deposit:"
money_invested = gets.to_f

puts "Time in days:"
time_investment = gets.to_f

puts "Indicate interest rate:"
interest_rate = gets.to_f

investment_calculation =
money_invested * (1 + interest_rate / 100 * time_investment / 365)
puts "Your money will be: $%.2f." % investment_calculation

I want to ask if the user wants to perform another operation:

puts "Would you like to perform another operation? Indicate 'Y' or 'N'"
another.operation = gets.chomp

If the user says N, I would say something like puts "Thanks for your time! The app will be closed in one minute. But if the user wants to run another operation (type Y), I need to run all the code again. I know this can be done with while, but don't know exactly. Any ideas?

Upvotes: 1

Views: 89

Answers (2)

pjs
pjs

Reputation: 19855

You can maintain an infinite loop, and break it when desired:

NO = %w{ n no nope negative negatory nyet }
loop do
  # all of your various questions & responses

  puts "Would you like to perform another operation? Indicate 'Y' or 'N'"
  response = gets.chomp
  break if NO.include?(response.downcase)

  # Additional code could go here, if it's appropriate
  # to perform repeated actions after user indicates
  # they don't want to quit
end

# cleanup code here

Upvotes: 4

Martin Konecny
Martin Konecny

Reputation: 59601

Use a boolean variable to switch between true/false based on user input. The first run it will be implicitly true:

do_loop = true
while do_loop

    puts "Money to deposit:"
    money_invested = gets.to_f

    puts "Time in days:"
    time_investment = gets.to_f

    puts "Indicate interest rate:"
    interest_rate = gets.to_f

    investment_calculation = money_invested * (1 + interest_rate/100 *     time_investment/365)
    puts "Your money will be: $%.2f." % investment_calculation

    puts "Would you like to perform another operation? Indicate 'Y' or 'N'"
    answer = gets.chomp

    # assign "true" to loop variable only if first character is 'Y' or 'y'
    do_loop = answer.size > 0 && answer.downcase[0] == 'y'
end

Upvotes: 1

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