Regular expression for number and slash

Question

I do not know regular expressions and going crazy to find one that accepts formats consisting on numbers and slash. For example:

• 5
• 5/10
• 10/15/30
• 10/20/120
• 20/120/250/300

Answer 1

This should work:

^\d+(\/\d+)*$

Look at the examples.

This means:

1. My string must begin (^) with a one or more digit (\d+)
2. Optionally ((..)*) followed by a slash and one or more digit (\/\d+), even many times (* means from 0 to many)
3. And then it must end ($).