Prime Multiplication Table

A command-line tool that prints a multiplication table of the first N prime numbers.

Installation

There are two ways to install Prime Multiplication Table, either straight from RubyGems or from the repository.

Installing from RubyGems

gem install pmt

Installing from repository

Clone the repository:

git clone https://github.com/SebastianCoetzee/pmt.git

Change into the directory:

cd pmt

Build the gem:

gem build pmt.gemspec

Install the gem (replace x with the version number of the gem):

gem install pmt-x.x.x.gem

Usage

Run the tool with the following command, which prints a multiplication table of the first 10 prime numbers:

pmt

Output:

+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
|    | 2  | 3  | 5   | 7   | 11  | 13  | 17  | 19  | 23  | 29  |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 2  | 4  | 6  | 10  | 14  | 22  | 26  | 34  | 38  | 46  | 58  |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 3  | 6  | 9  | 15  | 21  | 33  | 39  | 51  | 57  | 69  | 87  |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 5  | 10 | 15 | 25  | 35  | 55  | 65  | 85  | 95  | 115 | 145 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 7  | 14 | 21 | 35  | 49  | 77  | 91  | 119 | 133 | 161 | 203 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 11 | 22 | 33 | 55  | 77  | 121 | 143 | 187 | 209 | 253 | 319 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 13 | 26 | 39 | 65  | 91  | 143 | 169 | 221 | 247 | 299 | 377 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 17 | 34 | 51 | 85  | 119 | 187 | 221 | 289 | 323 | 391 | 493 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 19 | 38 | 57 | 95  | 133 | 209 | 247 | 323 | 361 | 437 | 551 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 23 | 46 | 69 | 115 | 161 | 253 | 299 | 391 | 437 | 529 | 667 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+
| 29 | 58 | 87 | 145 | 203 | 319 | 377 | 493 | 551 | 667 | 841 |
+----+----+----+-----+-----+-----+-----+-----+-----+-----+-----+

You can specify the number of prime numbers:

pmt --count 5

Output:

+----+----+----+----+----+-----+
|    | 2  | 3  | 5  | 7  | 11  |
+----+----+----+----+----+-----+
| 2  | 4  | 6  | 10 | 14 | 22  |
+----+----+----+----+----+-----+
| 3  | 6  | 9  | 15 | 21 | 33  |
+----+----+----+----+----+-----+
| 5  | 10 | 15 | 25 | 35 | 55  |
+----+----+----+----+----+-----+
| 7  | 14 | 21 | 35 | 49 | 77  |
+----+----+----+----+----+-----+
| 11 | 22 | 33 | 55 | 77 | 121 |
+----+----+----+----+----+-----+

To see an explanation of the command line interface, use the help function:

pmt --help

LICENSE

MIT