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bashparameter-expansion

Separating integer and fractional part of a decimal number

I want to separate a numeric decimal number, storing the integer part in bash variable ts and the fractional part in variable fr.

Had a go with parameter expansion, but keep getting the original number.

t=13.491675 
ts=${t#![0-9]*}
fr=${t%*![0-9]}
Solution

  • This should work with any decimal separator:

    shopt -s extglob
t=13.491675
ts="${t%%[^0-9]+([0-9])}"
fr="${t##+([0-9])[^0-9]}"