Regular expression to match number entered is in between -50 to 100000000

Question

I am trying to write a regular expression which can match enter number string which should be in range of -50 to 100000000

I have tried expression like

^(-?)(1000|[0-9][0-9][0-9]?)$

but it matches only -1000 to 1000 numbers.

example for to test are simple

Please help me to get such expression which can be match range -50 to 100M

I know we can write simple if condition but I want regex only.

Thanks in Advance.

That's... not what Regex are for... "I know we can write simple if condition but I want regex only." - WHY?! — Milney, Dec 12 '20 at 11:47
Related: https://stackoverflow.com/questions/676467/how-to-match-numbers-between-x-and-y-with-regexp — str, Dec 12 '20 at 11:50
The minus sign should only be applicable to the -50 till -1 part and not for the whole expression. `^(?:-0*(?:[1-9]|[1-4][0-9]|50)|(?:0*[0-9]{1,8}|100000000))$` — The fourth bird, Dec 12 '20 at 11:57

score 5 · Accepted Answer · answered Dec 12 '20 at 12:01

5

You can use the following regex:

/^(-50|-[1-4]?\d|100000000|[1-9]?\d{1,7})$/gm

Explanation:

^ match start of string

-50 match -50

OR

- only negative numbers

[1-4]? match 1 to 4 - optional, followed by: any number

OR

100000000 match 100000000

OR

[1-9]? match 1 to 9 - optional followed by:

\d{1,7} match any number 1 to 7 times

$ match end of line

Use global and multiline options.

answered Dec 12 '20 at 12:01

Poul Bak

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that would be great if you add solution if user add fractional value 33.44 upto 2 decimal places. – Nikse Dec 12 '20 at 14:59
That's not what the OP wants, so no. – Poul Bak Dec 12 '20 at 23:39
searching similar kind of answer with 2 decimal places can you please suggest. – Nikse Dec 13 '20 at 13:15
2

Ok, try this: `^(-50|-[1-4]?\d(\.\d\d?)?|100000000|[1-9]?\d{1,7}(\.\d\d?)?)$` - that will allow one or two decimals. – Poul Bak Dec 14 '20 at 04:03
^(-50|-[1-4]?\d(\.\d\d?)?|100000000|[1-9]?\d{1,7}(\.\d\d?)?)$ this expression works fine but boundary point not accept 50.00 or 100000000.00 can you please suggest. – Nikse Jan 10 '21 at 07:06
1

@Nikse: Add `(\.00?)?` after `-50` and after `100000000` – Poul Bak Jan 10 '21 at 10:32
Thank you it works as expected. – Nikse Jan 10 '21 at 13:10

Sergio Cabral · Answer 2 · 2020-12-12T12:42:17.410

3

Regular expression serving leading zeros and positive and negative sign. Works only for integers.

^(-0*(50|[0-4]?[0-9])|\+?0*([0-9]{1,8}|100000000))$

Test case

Using with JavaScript:

let number = -50; /* <-- test number or string here */
let withinTheRange = Boolean(/^(-0*(50|[0-4]?[0-9])|\+?0*([0-9]{1,8}|100000000))$/.exec(number));

edited Dec 12 '20 at 12:42

answered Dec 12 '20 at 12:31

Sergio Cabral

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That's a complete solution. Great work! – Felipe Endlich Dec 12 '20 at 12:35

Regular expression to match number entered is in between -50 to 100000000

2 Answers2