How to Match a Phone Number (407) 555-1212 Using Regular Expression in UNIX

Regular Expression for Matching Phone Number (407) 555-1212 in UNIX

The regular expression for UNIX to match the phone number (407) 555-1212 can be written as follows:

1. The backslash (\) is used to escape special characters in the regular expression.
2. \(\d{3}\) matches the opening parenthesis followed by three digits. The \d represents any digit, and the {3} specifies that it should match exactly three digits.
3. The space character matches a space.
4. \d{3} matches three digits.
5. The hyphen (-) matches a hyphen.
6. \d{4} matches four digits.

So, the regular expression \(\d{3}\) \d{3}-\d{4} would match the phone number (407) 555-1212 in a text file.

The regular expression \(\d{3}\) \d{3}-\d{4} is used to match the specific phone number format (407) 555-1212 in a text file on UNIX systems. The expression consists of escaping the parentheses, matching three digits inside the parentheses using \d{3}, matching a space, matching three digits using \d{3}, matching a hyphen, and finally matching four digits using \d{4}.

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