Function with optional positional argument [duplicate]

Question

With the following bash function, how can I get the function allow $2 to be optional, defaulting its value when nothing is passed for that argument ?

serputil ()
 {
  local opstring="$1"
  local sersel="$2"
 }

Gilles Quénot · Accepted Answer · 2023-05-10 01:21:25Z

1

iserputil () {
  local opstring="$1"
  local sersel="${2:-DEFAULT}"
  echo "$opstring"
  echo "$sersel"
 }

iserputil ok

ok
DEFAULT

If you run

iserputil ok ko

You will get

ok
ko

answered May 10, 2023 at 1:21

Gilles Quénot

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