2. Write down the extended regular expression for following questions Eg. Social

Question

2. Write down the extended regular expression for following questions Eg. Social security number in the format of 999-99-9999. Answer: [0-93)-[0-9112)-[0-9114) 1) 1) Valid date format in the format of MMM-DD,YYYY. Note: the first character of the month is capitalized (eg. May-09,2008 Apr-19,2018 Jan-01,2000) 2) An account name which is 8 to 15 characters long, begins with a letter or underscore, ends with a digit, and composed by letters, numbers, underscores and hyphens. (e.g. my Name1, cat 2, One-1) 3) A single-line comment starting with a # and continuing until the end of the line. Note: only whitespace is allowed between the start of the line and the comment. (eg #This program outputs the string hello world. ) 4) Integers in the range between 00 and 99. (e.g. 0, 00, 01, 15, 55, 59,99) 5) Phone number in any of the following format: 999-(999)9999, 999999-9999, 999-999-9999. (Note: all of these formats should be matched by a single regular expression)

Explanation / Answer

1. [A-Z][a-z]{2}-[0-9]{2},[0-9]{4}
2. [a-zA-Z_]+[a-zA-Z_-]*[0-9]+
3. #[A-Z][a-z ]*.
4. [0-9]{1,3}
5. [0-9]{3}[-]?[(]?[0-9]{3}[)]?[0-9]{4}

? -- repeats once or not at all
* -- repeats zero or more times
+ -- repeats once or more times
{x} -- repeats n times only
{a, b} -- repeats at least a times but less than b times

Let me know if you have any queries or clarifications.... :)

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.