12-Lab-Arithmetic-Operations.md

Lab - Arithmetic Operations

• Take me to Practice Test

Solutions to practice test - Arithmetic Operations

• Check the solution at /tmp/assets/calculation-answer.sh

  bob@caleston-lp10:~$ cat calculation.sh
  A=20
  B=10
  
  echo "Sum is $(( A + B))"
  echo "Difference is $(( A - B))"
  echo "Product is $(( A * B))"
  echo "Quotient is $(( A / B))"
  

  $ bash calculation.sh
  

• Check the solution at /tmp/assets/calculation-answer-2.sh

  bob@caleston-lp10:~$ cat calculation.shA=$1
  B=$2
  
  echo "Sum is $(( A + B))"
  echo "Difference is $(( A - B))"
  echo "Product is $(( A * B))"
  echo "Quotient is $(( A / B))"
  

• Check the solution at /tmp/assets/calculate-price.sh

  bob@caleston-lp10:~$ cat calculate-price.sh
  price=$(( $1 * $2 ))
  
  echo "The total price for items is ${price} dollars"
  

• The "*" should be escaped as "*" for multiplication using expr statement.

  ``` $ cat calculate-total-apples.sh baskets=4 apples_per_basket=5 total_apples=`expr $baskets \* $apples_per_basket` echo "Total Apples = $total_apples" ```

• Answer script: /tmp/assets/calculate-average-answer.sh

  $ cat calculate-average.sh
    num1=$1
    num2=$2
    num3=$3
    sum=$(( num1 + num2 + num3 ))
    average=$(echo "$sum / 3" | bc -l)