Bye Bye Hello World

Traditionally, the Hello World program is the first example offered as the introduction to a programming language and does nothing more than output the string "Hello World" to the output medium--generally the console. While adequate to demonstrate a particular language can actually do something, for anyone other than the novice programmer, a more thorough example is called for.

These code examples attempt to demonstrate basic capabilities of the languages we will examine by expanding Hello World to include:

• Command Line Parameters
  Taking input criteria from the command line.

• Prompted Input
  Prompting the user for input criteria.

• Input Validation
  Examination of input criteria against programmed limits.

• Conditional Branching
  Altering the execute path based on conditions.

• Iteration
  Repeated execution until a condition is met.

Usage

bbhw [count]

where: count = Number of iterations. User prompted of not supplied.

Result

Counts down from count to 0, pausing between each iteration, and prints each count until complete.