Hi, I am writing a couple of regex values to validate for valid longitude values that should fall within a specific range , and so far i got the general syntax ok for longitudes , my regex is as follows: [-]?3[1-7]*[.]{0,1}[0-9]{0,6} i.e an optional negative sign followed by a number in the range 31-37 , followed by an optional decimal point, and if there is a decimal point then a set of numeric character to a max of 6 characters. When i run the regex on some test values i get the following results -31.00000000 TRUE 31.00000000 TRUE -37.999999999 TRUE 37.999999999 TRUE -36.744uiu82 TRUE ( but should be false.; it truncates the characters to return a true on -36.744) 36.744uiu82 TRUE ( but should be false.; it truncates the characters to return a true on 36.744) -3sers6.744uiu82 TRUE ( but should be false.; it truncates the characters to return a true on -3) 3sers6.744uiu82 TRUE ( but should be false.; it truncates the characters to return a true on 3) 28.90909 FALSE (does not fall in range) -28.90909 FALSE (does not fall in range) My problem is with the values in the text highlighted . Obviously 36.uoiuy5656 is not a valid value since in its entirety it contains a mix of non-numeric values What am i doing wrong or missing here? I am not well versed with greedy or backreferenced syntax. Any assitance would be greatly appreciated. Kind regards Kiti Chigiri