RegEx How can I match all numbers greater than 49

Question

I m somewhat new to regular expressions and am writing validation for a quantity field where regular expressions need to be used   How can I match all numbers greater than or equal to 50   I tried    5-9  0-9     but that only matches 50-99  Is there a simple way to match all possible numbers greater than 49   only integers are used

User · Accepted Answer

The fact that the first digit has to be in the range 5-9 only applies in case of two digits. So, check for that in the case of 2 digits, and allow any more digits directly:

^([5-9]\d|\d{3,})$

This regexp has beginning/ending anchors to make sure you're checking all digits, and the string actually represents a number. The | means "or", so either [5-9]\d or any number with 3 or more digits. \d is simply a shortcut for [0-9].

Edit: To disallow numbers like 001:

^([5-9]\d|[1-9]\d{2,})$

This forces the first digit to be not a zero in the case of 3 or more digits.

User · Answer

I know this is old  but none of these expressions worked for me  maybe it s because I m on PHP   The following expression worked fine to validate that a number is higher than 49      5-9  0-9     1-9  d 3  d

User · Answer

Try this regex    5-9  d   d 3

User · Answer

Next matches all greater or equal to 11100      1-9  1-9  1-9  d 2  d   1-9  2-9  d 3  d   2-9  d 4  d   d 6  d      For greater or equal 50      5-9  d 1  d   d 3  d      See pattern and modify to any number   Also it would be great to find some recursive forward backward operators for large numbers

User · Answer

I know there is already a good answer posted  but it won t allow leading zeros  And I don t have enough reputation to leave a comment  so    Here s my solution allowing leading zeros   First I match the numbers 50 through 99  with possible leading zeros    0  5-9  d   Then match numbers of 100 and above  also with leading zeros     0  1-9  d 2     Add them together with an  or  and wrap it up to match the whole sentence    0   1-9  d 2    5-9  d     That s it

User · Answer

Try a conditional group matching 50-99 or any string of three or more digits   var r         5-9  d  d 3

[javascript] RegEx: How can I match all numbers greater than 49?

Examples related to javascript

Examples related to regex