06-Lab-Functions.md

Lab Functions

• Take me to the Lab

1. Solution is give below

    The name of the function is after the function keyword and before the double brackets ()
    Function name is prepare-directory-structure
   
   

2. Solution is give below

   function prepare-directory-structure(){
   mkdir apps
   cd apps  mkdir app1 app2 app3  touch app1/logs app2/logs app3/logs
   }
   

3. Solution is give below

   function add(){
     sum=$(( $1 + $2 ))
   }
   
   result=$(add 3 5)
   echo "The result is $result"
   
   

4. Solution is give below

   function add(){
     sum=$(( $1 + $2 ))
     echo $sum
   }
   
   result=$(add 3 5)
   echo "The result is $result"
   
   

5. Solution is given below

   function add(){
     sum=$(( $1 + $2 ))
   }
   
   result=$(add 3 5)
   echo "The result is $result"
   

6. Solution is given below

   #!/bin/bash
   function read_numbers(){
     read -p "Enter Number1: " number1
     read -p "Enter Number2: " number2
   }
   
   while true
   do
     echo "1. Add"
     echo "2. Subsctract"
     echo "3. Multiply"
     echo "4. Divide"
     echo "5. Quit"
   
     read -p "Enter your choice: " choice
   
     case $choice in
       1)  read_numbers
           echo $(( $number1 + $number2 )) ;;
       2)
           read_numbers
           echo $(( $number1 - $number2 )) ;;
   
       3)
           read_numbers
           echo $(( $number1 * $number2 )) ;;
   
       4)
           read_numbers
           echo $(( $number1 / $number2 )) ;;
   
       5)  break
     esac
   
   done
   

7. Solution is given below

   function launch_rocket(){
     mission_name=$1
   
     mkdir $mission_name
   
     rocket-add $mission_name
   
     rocket-start-power $mission_name
     rocket-internal-power $mission_name
     rocket-start-sequence $mission_name
     rocket-start-engine $mission_name
     rocket-lift-off $mission_name
   
     rocket_status=$(rocket-status $mission_name)
   
     echo "The status of launch is $rocket_status"
   
     if [ $rocket_status = "launching" ]
     then
       sleep 2
       rocket_status=$(rocket-status $mission_name)
     fi
   
     if [ $rocket_status = "failed" ]
     then
       rocket-debug
       exit 1
     fi
   }
   
   launch_rocket $1