This is question 11 from the regex101 quiz

I have been trying to figure out a solution to solve the test case below from failing. Can someone help with this?

Test 60/89: Just a dot is not a valid floating number.

I am using the regex below.

/^[ -]?\d*([.,]\d*)?([Ee][ -]?\d )?$/g

CodePudding user response：

You can use

/^[- ]?(\d [,.]|\d*[.,]?\d )(e[- ]?\d )?$/i

Details:

• ^ - start of string
• [- ]? - an optional - or
• (\d [,.]|\d*[.,]?\d ) - either one or more digits, then , or ., or zero or more digits, an optional .or,` and then one or more digits
• (e[- ]?\d )? - an optional occurrence of e, then an optional - or and then one or more digits
• $ - end of string.