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Regular expression to accept negative number

I have this regular expression below:

^([0-9]+,)*[0-9]+$

This will validate the input from a user to accept positive or negative numbers only that is comma separated or dash.

123,123,10
10,10
25
-25,10

My regular expression above is only working for positive numbers and comma separator. How can I modify this to work with dash (10-25-30) and negative numbers?

Solution

  • You can use this regex:

    ^([-+]?[0-9]+[-,])*[+-]?[0-9]+$

    RegEx Demo

    RegEx Details:

    • ^: Start
    • (: Start capture group
      • [-+]?: Optionally match - or +
      • [0-9]+: Match 1+ of any digit
      • [-,]: Match - or ,
    • )*: End capture group. * lets this group repeat 0 or more times
    • [+-]?: Optionally match - or +
    • [0-9]+: Match 1+ of any digit
    • $: End