Re: Using functions to return something

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From	Robert Klemme <shortcutter@googlemail.com>
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Subject	Re: Using functions to return something
Date	Tue, 19 Apr 2016 19:19:19 +0200
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On 19.04.2016 16:06, Cai Gengyang wrote:
> --- So I managed to write a simple function and use return and puts to display it.
>
> def add(a, b)
>    puts "ADDING #{a} + #{b}"
>    return a + b
> end
>
> age = add(30, 5)
>
> puts "Age: #{age}"
>
> Display :
>
> CaiGengYangs-MacBook-Pro:GoatBoy CaiGengYang$ ruby ex80.rb
> ADDING 30 + 5
> Age: 35
>
> --- But when I tried to extend it to (A+B)/C, it display error message :
>
> def add(a, b)
>    puts "(ADDING #{a} + #{b}) / #{c}"
>    return (a + b) / c
> end
>
> age = add(30, 10) / 5
>
> puts "Age: #{age}"
>
> Display :
>
> CaiGengYangs-MacBook-Pro:GoatBoy CaiGengYang$ ruby ex90.rb
> ex90.rb:2:in `add': undefined local variable or method `c' for main:Object (NameError)
> 	from ex90.rb:6:in `<main>''
>
> Any smart person over here ? Help lah ...

The error message really says it all.

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Thread

Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-19 07:06 -0700
  Re: Using functions to return something Robert Klemme <shortcutter@googlemail.com> - 2016-04-19 19:19 +0200
    Re: Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-19 22:28 -0700
      Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 09:25 +0200
        Re: Using functions to return something Cai Gengyang <gengyangcai@gmail.com> - 2016-04-20 04:12 -0700
          Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 15:42 +0200
            Re: Using functions to return something Kaz Kylheku <545-066-4921@kylheku.com> - 2016-04-20 14:34 +0000
              Re: Using functions to return something Sebastian Christ <rudolfo.christ@gmail.com> - 2016-04-20 20:48 +0200
                Re: Using functions to return something Kaz Kylheku <545-066-4921@kylheku.com> - 2016-04-20 19:27 +0000
      Re: Using functions to return something jacki <collector@idealan.pl> - 2016-04-20 10:30 +0200

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