Unix Tip: SUM OF ALL THE DIGITS

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UNIX HOT TIP

Unix Tip 2891 - January 5, 2010

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SUM OF ALL THE DIGITS

Here is an easy way to calculate the sum of all the digits of a number:

$ expr `echo "987655" | sed -e 's/[0-9]/ + &/g' -e 's/^ +//g'`
40

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