The Scope of Constants : Constants « Language Basics « Ruby

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Ruby » Language Basics » Constants   The Scope of Constants def circumference_of_circle(radius)   2 * Pi * radius end Pi = 3.141592 puts circumference_of_circle(10)   Related examples in the same category 1.  Constants in Ruby start with an uppercase letter 2.  Ruby allows you to change the values in constants by assigning a new value to them: 3.  Change the value of Pi, it'll let you do it, but you'll get a warning: 4.  Constants are defined within the scope of the current class and are made available to all child classes, unless they're overridden: 5.  Array constant 6.  freeze does nothing since Fixnums are already immutable.

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