Match a Single Character ( . ) (?)

You can match any single character with a dot (.). A dot means there must be a character in the string.

You can make a single character optional by placing a question mark (?) after it.

Regular Expression	Match	Not a Match
.t	at, xt	ax, xx
m.x	mix	mx, miix
mi?x	mix, mx	miix
m.?x	mix, max, mx	miix, maax