Question

Can you suggest a javascript regex to check the number format 1.00.999,000
here ‘.’ represents 100’s and ‘,’ represents decimal points.

Answer 1

If your just asking for a number format for your exact match then

1.00.999,000 becomes [0-9]\.[0-9]{2}.[0-9]{3},[0-9]{3}

What I suspect you really want may be

[0-9]{0,2}(.[0-9]{3})+,[0-9]{0,3}

so two numbers, followed by any amount of dot three number followed by , between 0 and 3 numbers. I could be wrong in interpreting the number format but I suspect your example of 1.00.999,000 should have an extra zero in the first grouping from the left (000 instead of 00) to make it uniform with the sample after it, or drop the dot between the 1.00.