YYYYMMDD YYYY-MM-DD YYYY.MM.DD YYYY/MM/DD YYYY-M-D YYYY.M.D YYYY/M/D If the sep[-./] is not given, "0" must appear before a single num. such as 20180203, 20190905. If the sep [-./] is given, the prefix 0 is optional.

This Regular expression is applicable to all string literals. If we want to match character outside those strings, then just need to add that character in rest of the groups.

Regular expression to filter decimal from 1.00 to 5.00 ( inclusive) Plus occurrence of 0