Avoid "++ requires lvalue" Error in Loop Calculation - Shell Programming and Scripting

sandeepb · #1 (**permalink**) 09-20-2007

Hi All,

Please help me to perform sum of values in a loop, I am getting following error:

"total=0++432907765772: ++ requires lvalue"

where actual statement is as : total=$total+$amt

where amt can have +ve or -ve values

Thanks
Sandeepb

porter · #2 (**permalink**) 09-20-2007

The convention is that a number that has no leading sign is positive.

Hence if the string has a leading + then it is redundent, I suggest you strip it off with sed or something.

sandeepb · #3 (**permalink**) 09-24-2007

Hi ,

Can some one please provide me an example code?

Thanks
Sandeep

porter · #4 (**permalink**) 09-24-2007

$ echo "+01234" | sed "s/+//"
01234

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