带有小数点的可选逗号分隔数字的正则表达式 [英] Regex for optional comma separated number with decimal point

问题描述

我在寻找匹配以下内容的正则表达式

I'm after a regular expression which will match the following

1,245.30
24,235,235.50
12235235.60
235.50

小数点是强制性的，但我希望逗号是可选的.基于这个答案逗号分隔数的正则表达式我能够想出这个表达式这对于逗号分隔的数字非常有用.

The decimal is mandatory but I'd like the comma to be optional. Based off this answer Regex for Comma Separated Number I was able to come up with this expression which works great for the comma separated numbers.

(^\d{1,3}([,]\d{3})*([.]\d{2}){0,1}$)

但是，我无法将逗号设为可选.

However I'm having trouble making the commas optional.

推荐答案

嗯，只允许一个不带逗号的数字作为明确的替代方案:

Um, just allow a number without commas as an explicit alternative:

^(\d?\d?\d(,\d\d\d)*|\d+)(\.\d\d)?$

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