| . (dot) | Any single character except newline |
| * | zero or more occurances of any character |
| [...] | Any single character specified in the set |
| [^...] | Any single character not specified in the set |
| ^ | Anchor - beginning of the line |
| $ | Anchor - end of line |
| \< | Anchor - begining of word |
| \> | Anchor - end of word |
| \(...\) | Grouping - usually used to group conditions |
| \n | Contents of nth grouping |
| [A-Z] | The SET from Capital A to Capital Z |
| [a-z] | The SET from lowercase a to lowercase z |
| [0-9] | The SET from 0 to 9 (All numerals) |
| [./=+] | The SET containing . (dot), / (slash), =, and + |
| [-A-F] | The SET from Capital A to Capital F and the dash (dashes must be specified first) |
| [0-9 A-Z] | The SET containing all capital letters and digits and a space |
| [A-Z][a-zA-Z] | In the first position, the SET from Capital A to Capital Z In the second character position, the SET containing all letters |
| /Hello/ | Matches if the line contains the value Hello |
| /^TEST$/ | Matches if the line contains TEST by itself |
| /^[a-zA-Z]/ | Matches if the line starts with any letter |
| /^[a-z].*/ | Matches if the first character of the line is a-z and there is at least one more of any character following it |
| /2134$/ | Matches if line ends with 2134 |
| /\(21|35\)/ | Matches is the line contains 21 or 35 Note the use of ( ) with the pipe symbol to specify the 'or' condition |
| /[0-9]*/ | Matches if there are zero or more numbers in the line |
| /^[^#]/ | Matches if the first character is not a # in the line |
| Notes: 1. Regular expressions are case sensitive 2. Regular expressions are to be used where pattern is specified | |