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{|cellspacing="0" width="100%" cellpadding="5" border="1"
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!width="*"|Description!!width="*"|Regexp!!width="*"|Matches!!width="*"|Does not match!!width="*"|Comments
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|A specific word||<code><nowiki>Hello</nowiki></code>||Hello<br>Hello there!<br>Hello, World!<br>He said, "Hello James", in a very threatening tone||Hi there<br>Hell of a Day<br>h el lo||
|A specific word with nothing else on the line||<code><nowiki>^Hello$</nowiki></code>||Hello||Hello there!<br>Hello, World!<br>He said, "Hello James", in a very threatening tone<br>Hi there<br>Hell of a Day<br>h el lo||
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|An integer5-character line||<code><nowiki>[-+]?[[:digit:]]+^.....$||+15<br/nowiki>-2<br/code>720||rouge<br>1440green<br>1280<br>1920<br>000Ho-ho<br>012||+ 4Yellow<br>3.14long line<br>0x47tiny<br>$1.1312-45-78||
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|Lines that start with a vowel||<code><nowiki>^[AEIOUYaeiouy]</nowiki></code>||Allo<br>Everyhing<br>Energy<br>Under<br>Yellow||Hello<br>White<br>4164915050<br>Grinch|||-|Lines that end in a punctuation mark||<code><nowiki>[[:punct:]]$</nowiki></code>||Hello there!<br>Thanks.<br>What do you think?||Hello there<br>416-491-5050<br>New Year greetings|||-|An integer||<code><nowiki>^[-+]?[[:digit:]]+$</nowiki></code>||+15<br>-2<br>720<br>1440<br>1280<br>1920<br>000<br>012||+ 4<br>3.14<br>0x47<br>$1.13<br>$4|||-|A decimal number||<code><nowiki>^[-+]?[[:digit:]]+(\.[[:digit:]]*)?$</nowiki></code>||+3.14<br>42<br>-1000.0<br>+212<br>+36.7<br>42.00<br>3.333333333<br>0.976||.976<br>+-200<br>1.1.1.1<br>13.4.7||
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|A Canadian Postal Code||<code><nowiki>^[ABCEGHJKLMNPRSTVXY][0-9][ABCEGHJKLMNPRSTVWXYZ] ?[0-9][ABCEGHJKLMNPRSTVWXYZ][0-9]$</nowiki></code>||H0H 0H0<br>M3C 1L2<br>K1A 0A2<br>T2G 0P3<br>V8W 9W2<br>R3B 0N2<br>M2J2X5<br>M5S 2C6||POB 1L0<br>90210<br>MN4 2R6||A Canadian postal code alternate between letters and digits: A9A 9A9. The first letter must be of of ABCEGHJKLMNPRSTVXY and the remaining letters must be one of ABCEGHJKLMNPRSTVXY.
|Phone Numbers||<code><nowiki>^[^+[:digit:]]*(\+?1)?[^+[:digit:]]*[2-9]([^+[:digit:]]*[0-9]){9}[^+[:digit:]]*$</nowiki></code>||(416) 967-1111<br>+1 416-736-3636<br>416-439-0000||+65 6896 2391<br>555-1212||A Canadian phone number consists of a 3-digit Area Code (which may not start with 0 or 1) and a 10-digit local number consisting of an exchange (3 digits) and a line (4 digits). The country code for Canada (and the US) is 1, so the number may be preceeded by +1 or 1. Area codes are sometimes contained in parenthesis, and dashes or spaces are sometimes used as separators.
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|IP Address (IPv4 dotted quad)||<code><nowiki>^((2[0-5][0-9]|[1-2][0-9][0-9]|[1-9][0-9]|[1-9])\.){3}(2[0-5][0-9]|[1-2][0-9][0-9]|[1-9][0-9]|[1-9])$</nowiki>||</code>||1.1.1.1<br>4.4.8.8<br>8.8.8.8<br>7.12.9.43<br>10.106.32.109<br>IP=100.150.200.250<br>172.16.97.1<br>192.168.0.1<br>||IP=67.69.105.143||<br>1.10.100.1000<br>255.255.255.0<br>IP=100.150.200.250<br>103.271.92.16<br>1O.10.10.10||An IPv4 address in "dotted quad" notations consists of four numbers in the range 0-255 separated by periods. The numbers are called "octets" (which means a collection of eight bits, a more precise definition an alternate way of a saying "byte").
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|Private IP Address||<code><nowiki>(10\.((2[0-5][0-9]|[1-2][0-9][0-9]|[1-9][0-9]|[1-9]))|192\.168|172\.(1[6-9]|2[0-9]|3[0-1]))\.(2[0-5][0-9]|[1-2][0-9][0-9]|[1-9][0-9]|[1-9])\.(2[0-5][0-9]|[1-2][0-9][0-9]|[1-9][0-9]|[1-9])</nowiki></code>||10.4.72.13<br>172.16.97.1<br>192.168.0.1<br>IP=192.168.113.42||1.1.1.1<br>4.4.8.8<br>192.169.12.6<br>192.168.400.37<br>Address is 1 . 2 . 3 . 4||Valid IPv4 dotted quad address with a first octet of 10; or first two octets of 192.168; or first octet of 172 followed by a second octet in the range 16-31.
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