34 lines
1.4 KiB
Markdown
34 lines
1.4 KiB
Markdown
# Phone Number
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Clean up user-entered phone numbers so that they can be sent SMS messages.
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The **North American Numbering Plan (NANP)** is a telephone numbering system used by many countries in North America like the United States, Canada or Bermuda. All NANP-countries share the same international country code `1`.
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NANP numbers are ten-digit numbers consisting of a three-digit Numbering Plan Area code, commonly known as *area code*, followed by a seven-digit local number. The first three digits of the local number represent the *exchange code*, followed by the unique four-digit number which is the *subscriber number*.
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The format is usually represented as
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```
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(NXX)-NXX-XXXX
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```
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where N is any digit from 2 through 9 and X is any digit from 0 through 9.
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Your task is to clean up differently formated telephone numbers by removing punctuation and the country code (1) if present.
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**Example:**
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+1 (613)-995-0253
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613-995-0253
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1 613 995 0253
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613.995.0253
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- - - - - - - - - - - - -
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6139950253
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**Note:** As this exercise only deals with telephone numbers used in NANP-countries only 1 is considered a valid country code.
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## Source
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Event Manager by JumpstartLab [http://tutorials.jumpstartlab.com/projects/eventmanager.html](http://tutorials.jumpstartlab.com/projects/eventmanager.html)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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