Regular Expression to match a string of numbers and dash in javascript

Question

I need to match a string like 2431-72367 , ie, a string with at least one number before and after the dash and only one dash.

I need to check it in JavaScript. Can anyone give me the regex and explain it?

Answer 1

/^\\d+-\\d+$/ will work.

• ^ signals the begin of the string.
• \\d+ means one or more digits.
• $ signals the end of the string.

As a result, /^\\d+-\\d+$/.test("2431-72367") returns true.

Answer 2

The regex could be something like this:

^\d+-\d+$

This means:

^             Start of string
    \d            Digit
    +             One or more
    -             "-"
    \d            Digit
    +             One or more
    $             End of string