Questions

1. Which of the following methods would you used to perform integer math from the command-line?
   1. echo 1+1
   2. echo 1 + 1
   3. echo $(bc 1+1)
   4. expr 1+1
   5. expr 1 + 1
2. You want to ensure that your shell script works on bash, as well as on non-bash shells. Which of the following commands could you use in your script?
   1. echo $((1+2+3+4))
   2. echo $[1+2+3+4]
   3. echo $[[1+2+3+4]]
   4. echo $(1+2+3+4)
3. You want to perform floating point math. Which of the following commands would you use?
   1. bc
   2. bc -f
   3. bc -l
   4. bc --float
4. You need to find the natural logarithm of 8. How would you do it?
   1. expr log(8)
   2. echo [log(8)]
   3. Use l(8) with bc
   4. Use log(8) with bc
5. Which of these commands would you use to find the approximate value of П?
   1. pi=$("scale=10...