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Thanks, Akshay Hedge and Andrew!

This works nicely: variable=$(echo "($b+0.5)/1" | bc )
The command substitution didn't for some reason.

I'm converting decimal to integer with bc, and I'd like to assign the integer output from bc to a variable 'val'.

E.g. In the code below: If b is 5000.000, lines 6 and 8 will output:
5000...

Beautifully simple! Thanks a lot :-)
I'm new to shell scripting and very much appreciate your help.

I'd like to read a file (mydata.dat) line by line. The file consists of 5 columns filled with numbers, like so:

83.018 1.953 49.587 20550.000 353
83.213 1.953 49.195 ...