Apart from simple branches with
if, it is also possible to process multiple decision-making operations using the
case command. In a
case statement, the expression contained in a variable is compared with a number of expressions, and for each expression matched, a command is executed.
It is possible to have multiple branching using the
if/elif/else commands. But if more than two or three
elif commands are used, then code becomes very complex. When all the different conditions are depending on a single variable, in such
esac statement is used. The interpreter checks the value of the
case variable against
value3, and so on, till the match is found. If the value is matched then all the statements after that ...