regex - Regular Expression to validate my input -

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this question has answer here:

i need regular expression validate input. allowed phrases these:

63 0 3-203 1923-2930

so it's:

  • any number, or
  • any number - number

you can use following regex

^\d+(-\d+)?$

demo

explanation

  1. ^: start with
  2. \d+: matches 1 or more numbers
  3. ()?: matches 0 or 1 group
  4. -\d+: matches 1 or more numbers followed -
  5. $: ends with

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