regex - Regular Expression to validate my input -

this question has answer here:

• regex allow numbers , 1 hyphen in middle 3 answers

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