Req ex for 9+2 Numerci plus decimal values

Question

I am looking for a regular expression with the following requirements:

9 + 2 after decimal
If amount is zero, it should be invalid

I tried ^[1-9][0-9]*$ but it does work.

I am trying by looking over blogs. For instance I just found ^[1-9][0-9]*$ for value greater than zero on stack flow site only. — ShareYourExp, Sep 14 '20 at 17:22

Bohemian · Answer 1 · 2020-09-14T17:39:12.370

0

Use a negative look ahead, anchored to start, for “zero”. Here’s one way:

^(?!0*\.00)\d+\.\d\d$

The subexpression (?!0*\.00) means “what follows must not be any number of 0’s (including none) then .00".

edited Sep 14 '20 at 17:39

answered Sep 14 '20 at 17:33

Bohemian

412,405
93
575
722

score 0 · Accepted Answer · answered Sep 14 '20 at 19:37

Use

^(?![0.]+$)\d{1,9}\.\d{2}$

See proof

Explanation

--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
    [0.]+                    any character of: '0', '.' (1 or more
                             times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    $                        before an optional \n, and the end of
                             the string
--------------------------------------------------------------------------------
  )                        end of look-ahead
--------------------------------------------------------------------------------
  \d{1,9}                  digits (0-9) (between 1 and 9 times
                           (matching the most amount possible))
--------------------------------------------------------------------------------
  \.                       '.'
--------------------------------------------------------------------------------
  \d{2}                    digits (0-9) (2 times)
--------------------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string

Req ex for 9+2 Numerci plus decimal values

2 Answers2