Bash Scripting with Switch Case Statement

Bash Scripting

 
In Linux, all tasks from execution of services to loading and unloading of modules are carried out by programs and all programs need to be executed. You use the commands to access all the basic features of kernel. Shell scripting is a way to automate such tasks, and bash is one of the language, that has capabilities enough to be called as scripting as well as a language that can be used for programming on the POSIX platform, for small tasks.  Bash Scripting else if statement

 

Using Case Statement

Case statement is used as the alternative of if-elseif-else statement. The starting and ending block of this statement is defined by ‘case’ and ‘esac’. Create a new file named, ‘case_example.sh’ and add the following script. The output of the following script will be same to the previous else if example.

#!/bin/bash
echo "Enter your lucky number"
read n
case $n in
101)
echo echo "You got 1st prize" ;;
510)
echo "You got 2nd prize" ;;
999)
echo "You got 3rd prize" ;;
*)
echo "Sorry, try for the next time" ;;
esac

Run the file with bash command.
 

 



OR

echo "Enter a days name"
read m

case $m in monday)
echo "it's a monday time" ;;
tuesday)
echo "it's a tuesday time" ;;
wednesday)
echo "it's a wednesday time" ;;
thursday)
echo "it's a thursday" ;;
friday)
echo "it's a friday" ;;
saturday)
echo "it's a saturday" ;;
sunday)
echo "it's a holiday time" ;;
*)
echo "Please type days name" ;;
esac

Run the file with bash command.

OR

echo "Hint : 79, 85, 90"
echo
read -p "Enter your marks : " n
case $n in
90)
echo  echo -e "\nGot it man! you have to 90 marks in Maths" ;;
79)
echo -e "\nHurrah! you got 79 marks in English" ;;
85)
echo -e "\nYaa Man! you got 85 marks in Hindi" ;;
*)
echo -e "\nSorry, try for the next time" ;;
esac
echo

Run the file with bash command.

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