Thursday, April 21, 2022

Bash/bc

 y=1.0

y=`echo 'y +0.5'|bc -l`

should set y to 1.5.  Right?  $y is not recognized by bc.  y seems to stay 0

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2 comments:

  1. jdegeApril 21, 2022 at 11:46 AM

    Bash variable substitution doesn't happen in '-quoted strings.

    Use:

    y=1.0

    y=`echo "$y +0.5"|bc -l`

    ReplyDelete
  2. Butch HowardApril 22, 2022 at 12:21 PM

    This resulted in 1.5 for me:

    y=1.0; y=$(echo "$y+0.5" | bc -l ); echo $y

    ReplyDelete

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