Basic Regular Expressions

Question 1

Bracket Expression ( [ ] )

Answer 1

Example: b[aeiou]g

can match bag, beg, big, bog, bug

Question 2

Range Expression ( - )

Answer 2

Example: a[2-4]z

can match a2z, a3z, a4z

Question 3

Single Characters ( . )

Answer 3

Example: a.z

can match all words that starts with a and ends in z
that has one letter in between

Question 4

Caret ( ^ )

Answer 4

Shows the start of a line

Question 5

Dollar sign ( $ )

Answer 5

Shows the end of a line

Question 6

Repetition

Answer 6

Example: .*

Question 7

Backslash ( \ )

Answer 7

Used to escape a special character

Example: filename.txt