regex to match number comma number

Question

This is what I have right now:

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

My problem is that i want to be able add more than one digit before and after my comma. <

Answer 1

You have two regex main repeaters, the first is *, that say "repeat zero or more times". The second is + that say "repeat one or more time".

In this case, you need repeat one or more times the integer value and the decimal value. So you can try it:

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

So it will validate:

  0
  0123
  1,12
  1,0
  1,12340

But not will validate:

  1,
  ,0
  -1,0
  1e-10

Tips:

• You can replace [0-9] with only \d. It mean the same thing;
• You don't need group comma, just use , instead of [,]. You use that only for more than one possibilities, like accept comma and dot: [,\.];

Following the tips, you can try:

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