Regex to allow only numbers, dashes and dots

Question

What should be the Regex to allow a string that contains only numbers (0-9) or dashes (-) or dots (.)?

And disallow when a string contains otherwise (like alphabets or other special characters not listed above).

Example: Allowed

• 0
• 500-100-2.3.123

Disallowed

• abc123
• 500-a-c.def
• 100*

Answer 1

Something like this:

^[0-9.-]*$