Command line tool for printing out a multiplication table of the first N prime numbers.

Add this line to your application's Gemfile:

gem 'primes_table'

And then execute:

$ bundle

Or install it yourself as:

$ gem install primes_table

• By default the table will be generated as a matrix of 10X10;

• Only values greater or equal than 10 will be considered for specifying rows or columns;

• If you enter a value minor than 10, it will default to 10;

• Only integer values are considered. For example, if you enter an string, it will be converted to integer, the result will be 0 (zero) and will default to 10 because zero is minor than 10;

• Options:

  • -h, --help to see the available options;
  • -r, --rows ROWS to specify how many rows;
  • -c, --columns COLUMNS to specify how many columns;
  • --version it will give you the version of the gem you are using;

• Command examples:

  • primes_table --version;
  • primes_table --help;
  • primes_table;
  • primes_table -r 17;
  • primes_table -c 23;
  • primes_table -r 17 -c 23;

• Rspec:
  • bundle exec rspec

When working on this gem locally, if you want to run it, you just need to:

$ bundle exec bin/primes_table

and you will get the default output: