CODEWITHSUNDEEP
rubyruby-on-rails-3
Tor
Tor

Reputation: 17

How to call a user input in a method in ruby

I am trying to make this send the user input number to the function but I do not know what I am doing wrong. Can anyone help me?

puts "\n Amount with decimals:\n "
STDOUT.flush
numb = gets

puts "\n Multiplier:\n "
STDOUT.flush
mult = gets

stoque(0.01, numb, 0.5, mult, 1)

Upvotes: 0

Views: 68

Answers (2)

Stefan
Stefan

Reputation: 114178

If you want Ruby to raise an exception for invalid (i.e. non-decimal) input, you can also use:

numb = Float(gets)

Some examples:1

gets    | gets.to_f  | Float(gets)
--------+------------+--------------
'1'     | 1.0        | 1.0
'.5'    | 0.5        | 0.5
'1.2.3' | 1.2        | ArgumentError
''      | 0.0        | ArgumentError
'foo'   | 0.0        | ArgumentError

Because of the exception, you probably want to wrap it in a begin-rescue block, something like:

puts 'Amount with decimals:'
begin
  numb = Float(gets)
rescue ArgumentError
  puts 'Invalid amount'
  retry
end

1 note that gets includes the newline character "\n" if the input is entered with return. I've omitted it because trailing newlines are ignored by both, to_f and Float().

Upvotes: 1

sawa
sawa

Reputation: 168101

If you need floats, you need to convert the inputs to them:

numb = gets.to_f
...
mult = gets.to_f
...

Upvotes: 2

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