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From: Robert Klemme <shortcutter@googlemail.com>
Newsgroups: comp.lang.ruby
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/