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JavaScript - Regular Expression that validates one +/- at begning and one decimal point [closed]

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更多 发布于:2016-05-30 21:31
I'm trying to write a regular expression that can validate one +/- at begning, and one decimal point in the string using test() object method. Currently my regex is : /[\d\b\t\+\-]|\./ which allows multiple occurences of +, -, and dot(.). I need regular expression that recognize a string like: +23.24 or +0.23 or -23.24 or -0.23. Please reply.
answer(解决方案):

Basic regular expression /^[+-]\d+\.\d+$/
 Explanation: ^     Match start of string
[+-]  Match either plus or minus
\d+   Match one or more numbers of digits
\.    Match a period, the \ escapes it since it means any character
\d+   Match one or more numbers of digits
$     Match end of string

 

 

 

 

 

 

 

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