Regular expression for Indian mobile phone numbers?

Question

I'm looking for a regular expression that will match text given the following requirements:

• contains only 10 digits (only numbers)
• starts with 9.

These examples should match:

• 9999999999
• 9876543210

These examples should not match:

• 999999999
• 1234567890
• 8912456789
• qwe3456&ert

It is basically for Indian mobile numbers.

Please provide examples, I have already searched Google and those answers provide over-validation.

Answer 1

Try something like this:

^9\d{9}$

Answer 2

9{1}\d{9} or 9{1}[0-9]{9}

Answer 3

I always prefer the REs that can be used on any engine (so no fancy "\d" things):

^9[0-9]{9}$

or, in a crunch,

^9[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$

if the RE engine doesn't even have "{}".

Yes, I know the C# engine can do both "\d" and "{}" but that's not always the case.

Answer 4

^9[0-9]{9}$

Answer 5

Try this it is tested

^([9]{1})([0-9]{9})$