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If we need to check multiple conditions, we can use case…esac statement. It’s handy when we create a menu with many items.
Syntax for the case…esac statement:
case value in
pattern)
command;;
pattern2)
command;;
pattern3)
command;;
*)
defauld command if nothing matches;;
esac
Example, find the today’s day:
#!/bin/bash
NOW=$(date -d "$1" +"%a")
case $NOW in
Mon)
echo "Mon";;
Tue)
echo "Tue";;
Wed)
echo "Wed";;
Thu)
echo "Thu";;
Fri)
echo "Fri";;
Sun)
echo "Sun";;
*)
echo "Sat";;
esac
Another example:
#!/bin/bash
COMMAND="d"
case $COMMAND in
"d")
echo "Perform daily work";;
"w")
echo "Perform weekly work";;
*)
echo "Perform monthly work";;
esac
Save the code as case_esac.sh and run as:
$ bash case_esac.sh
Output:
Perform daily work
See Spring MVC custom validation. Also see our all the courses and lessons. Do not forget to explore code examples in our GitHub repository.
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