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Dear Experts,

I want to use bc to do some multiplication and return me a value with number of decimal places defined by myself.

For example:


echo "scale=10; 1.65*7" | bc




returns...

Thanks Tyler. Now I understand. Thanks for the excellent explanation!

I want to check if some directories with common prefix exist under current directory with bash, say, I have dictories like:

dirct_1
dirct_2
dirct_3
...


in the current directory. I did:
...

Thanks Ahamed!! It works. But then, if I just want to print one line, say 9th line.

awk 'NR =9 {print}' FILENAME


gave me all the lines in the file. How can I just print one specific line...

I am learning AWK and quite fresh now.

My Q: How could I use AWK to print lines from e.g. first to 8th, or 5th to 9th?

Thanks!!!