Question

10

Javascript regex for amount

rated 0 times [ 16] [ 6] / answers: 1 / hits: 18011 / 13 Years ago, fri, october 7, 2011, 12:00:00

I'm trying to get a regex for an amount:

ANY DIGIT + PERIOD (at least zero, no more than one) + ANY DIGIT (at least zero no more than two [if possible, either zero OR two])

What I have is:

/^d+.{0,1}+d{0,2)+$/

...obviously not working. Examples of what I'm trying to do:

123 valid

123.00 valid

12.34.5 invalid

123.000 invalid

Trying to match an amount with or without the period. If the period is included, can only be once and no more than two digits after.

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blaisep

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answered 13 Years ago hasancolec · Accepted Answer

Make the decimal point and 1 or 2 digits after the decimal point into its own optional group:

/^d+(.d{1,2})?$/

Tests:

> var re = /^d+(.d{1,2})?$/

  undefined

> re.test('123')

  true

> re.test('123.00')

  true

> re.test('123.')

  false

> re.test('12.34.5')

  false

> re.test('123.000')

  false