06-Lab-Functions.md

Lab Functions

• Take me to the Lab

1. Solution is give below

   Details

    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

   Details

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

3. Solution is give below

   Details

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

4. Solution is give below

   Details

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

5. Solution is given below

   Details

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

6. Solution is given below

   Details

   #!/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

   Details

   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