# a default commodity defined with the D directive will be used for any
# commodity-less amounts in subsequent transactions.
#
bin/hledger -f- print
<<<

; no default commodity
2010/1/1 x
  a  1000
  b

; pound, two decimal places, no digit group separator
D £1000.00

2010/1/1 y
  a  1000
  b

; dollar, comma decimal point, three decimal places, no digit group separator
D $1,000

2010/1/1 z
  a  1000
  b

>>>
2010/01/01 x
    a          1000
    b         -1000

2010/01/01 y
    a      £1000.00
    b     £-1000.00

2010/01/01 z
    a     $1000,000
    b    $-1000,000