Regular Expressions 101

Explanation

Pro

Definition Group(?(DEFINE) (?<amount>\d[\d.,]+) # amount, starting with a digit (?<currency1>Rs\.?\ ?) # Rs, Rs. or Rs with space (?<currency2>INR) # just INR )

Group amount(?<amount>\d[\d.,]+)

\da digit

Character Class[\d.,]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Comment: amount, starting with a digit

Group currency1(?<currency1>Rs\.?\ ?)

Rsthe literal text Rs (case sensitive)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\ ?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Comment: Rs, Rs. or Rs with space

Group currency2(?<currency2>INR)

INRthe literal text INR (case sensitive)

Comment: just INR

Non-Capturing Group(?: (?&currency1) (?P<money1>(?&amount)) | (?P<money2>(?&amount)) (?=\ (?&currency2)) )

1st Alternative (?&currency1) (?P<money1>(?&amount))

(?&currency1)calls group currency1 as a subroutine

Group money1(?P<money1>(?&amount))

(?&amount)calls group amount as a subroutine

2nd Alternative (?P<money2>(?&amount)) (?=\ (?&currency2))

Group money2(?P<money2>(?&amount))

(?&amount)calls group amount as a subroutine

Positive Lookahead(?=\ (?&currency2))

\ the literal (32₁₀ / 40₈ / 20₁₆)

(?&currency2)calls group currency2 as a subroutine

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?(DEFINE)
    (?<amount>\d[\d.,]+)    # amount, starting with a digit
    (?<currency1>Rs\.?\ ?)  # Rs, Rs. or Rs with space
    (?<currency2>INR)       # just INR
)

(?:
    (?&currency1)
    (?P<money1>(?&amount))
|
    (?P<money2>(?&amount))
    (?=\ (?&currency2))
)

New

Rs. 2000 , Rs.2000 , Rs 20,000.00 ,20,000 INR 200.25 INR.

Extraction

Rs. 2000 , Rs.2000 , Rs 20,000.00 ,20,000 INR 200.25 INR.