Standard Meta Characters

Quantifiers (continued)

Summary:

• {m,n} Must occur at least m times, but not more than n times.
• {n,} Must occur at least n times.
• {n} Must occur exactly n times.
• * Must occur 0 or more times (same as {0,}).
• + Must occur 1 or more times (same as {1,}).
• ? Must occur 0 or 1 time (same as {0,1}).