Numbers in Ruby: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial - The Diigo Meta page

• 22 Oct 16
  

  terence_taih
  • Ruby integers are objects of class Fixnum or Bignum
  • The increment and decrement operators (++ and --) are not available in Ruby
  • However, do note that the += and -= are available.

  1 more annotation...

• 25 Jan 16
  

  jezdean

  • in the digit string. Here's program p002rubynumbers.rb

      
      <!-- InstanceBeginEditable name="Code" --> 
    1. # p002rubynumbers.rb  
    2. =begin  
    3.  Ruby Numbers  
    4.  Usual operators:  
    5.  + addition  
    6.  - subtraction  
    7.  * multiplication  
    8.  / division  
    9. =end  
    10.   
    11. puts 1 + 2  
    12. puts 2 * 3  
    13. # Integer division  
    14. # When you do arithmetic with integers, you'll get integer answers  
    15. puts 3 / 2  
    16. puts 10 - 11  
    17. puts 1.5 / 2.6  
    # p002rubynumbers.rb  =begin  Ruby Numbers  Usual operators:  + addition  - subtraction  * multiplication  / division  =end   puts 1 + 2  puts 2 * 3  # Integer division  # When you do arithmetic with integers, you'll get integer answers  puts 3 / 2  puts 10 - 11  puts 1.5 / 2.6    <!-- InstanceEndEditable --> 
      

    Ruby integers are objects of class Fixnum or Bignum. Th
• 02 Jun 14
  

  Engelbert Tejeda
• 25 Apr 12
  

  xabriel g

  development ruby tutorial

• 18 Dec 11
  

  gtm250

  ruby

• 18 Nov 11
  

  Fumiaki Nagai
  • Ruby's definition of the modulo (%) operator differs from that of C and Java. In Ruby, -7%3 is 2. In C and Java, the result is -1 instead. In Ruby, the sign of the result (for % operator) is always the same as the sign of the second operand.
• 22 Jun 11
  

  Alex Crittenden
• 17 Apr 11
  

  Casey Chow

  ruby

  • • # When you do arithmetic with integers, you'll get integer answers  
  • the sign of the result (for % operator) is always the same as the sign of the second operand.

  • A common idiom is to use || to assign a value to a variable only if that variable isn't already set. This can be written as:

      
      <!-- InstanceBeginEditable name="Code" --> 
    1. @variable = @variable || "default value"  
    @variable = @variable || "default value"    <!-- InstanceEndEditable --> 
      

    or, more idiomatically, as:

      
      <!-- InstanceBeginEditable name="Code" --> 
    1. @variable ||= "default value"  

  1 more annotation...

• 06 Apr 09
  

  Eric Fer

  precedencia e hierarquia de classes

  rubyOnRails tutorial hierarquia ruby rubyLearning

• 25 Sep 07
  

  swan lin

  learn ruby

  • Ruby integers are objects of class Fixnum or Bignum. The Fixnum and Bignum classes represent integers of differing sizes. Both classes descend from Integer (and therefore Numeric). The floating-point numbers are objects of class Float, corresponding to the native architecture's double data type.

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