Regular Expressions 101

Pro

^start of string

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Non-Capturing Group(?:\._[A-Z])+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

$end of string

Detailed match information will be displayed here automatically.

26 tokens

^_[A-Z](?:\._[A-Z])+\.[a-z]$

_A._B._C._D._F.f

_A._B._C._D._F.f