Strings for the Match Pattern Function Example

Characters to Be Matched Regular Expression
VOLTS VOLTS
All uppercase and lowercase versions of volts, that is, VOLTS, Volts, volts, and so on [Vv][Oo][Ll][Tt][Ss]
A space, a plus sign, or a minus sign [ +-]
A sequence of one or more digits [0-9]+
Zero or more Spaces \s* or * (that is, a space followed by an asterisk)
One or more Spaces, Tabs, Newlines, or Carriage Returns [\t \r \n \s]+
One or more characters other than digits [~0-9]+
The word Level only if it begins at the offset position in the string ^Level
The word Volts only if it appears at the end of the string Volts$
The longest string within parentheses (.*)
The longest string within parentheses but not containing any parentheses within it ([~( )]*)
The character [ [ [ ]