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stringbashreplaceexifoperation

floating-point operations with bash

how can I transform the string "620/100" into "6.2" in a bash script

The context of my question is about image processing. EXIF data are coding the focal length in fractional format, while I need the corresponding decimal string.

Thanks for helping, Olivier

Solution

  • Use bc -l

    bc -l <<< "scale=2; 620/100"
6.20

    OR awk:

    awk 'BEGIN{printf "%.2f\n", (620/100)}'
6.20