How do you write a case statement in Shell?

The basic syntax of the case… esac statement is to give an expression to evaluate and to execute several different statements based on the value of the expression. The interpreter checks each case against the value of the expression until a match is found. If nothing matches, a default condition will be used.

Which symbol represents the default case in switch case of shell scripting?

The asterisk symbol* can be used to define the default case.

Which of the following is used to separate 2 patterns in a case statement?

The “|” symbol is used for separating multiple patterns, and the “)” operator terminates a pattern list. Each case plus its according commands are called a clause.

How does the case command in Bash work?

It works like a switch-case statement of other standard programming languages. This command starts with ‘case’ statement and closes by ‘esac’ statement. No break statement is used in the case command and double bracket (;;) is required to mention the statement (s) for any particular matching.

How to use case statement in Linux script?

The following shell script demonstrate the concept of command line parameters processing using the case statement (casecmdargs.sh): #!/bin/bash OPT=$1 # option FILE=$2 # filename # test -e and -E command line args matching case $OPT in -e | -E) echo “Editing $2 file…”

Which is the simplest form of the Bash IF THEN ELSE statement?

Bash case statement is the simplest form of the bash if-then-else statement. Syntax of bash case statement. Following are the key points of bash case statements: Case statement first expands the expression and tries to match it against each pattern.

What’s the difference between a JavaScript and a bash case statement?

The Bash case statement has a similar concept with the Javascript or C switch statement. The main difference is that unlike the C switch statement the Bash case statement doesn’t continue to search for a pattern match once it has found one and executed statements associated with that pattern.