UNIX script -- case


 
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# 1  
Old 02-01-2013
UNIX script -- case

i could like to try when i input a integer , the program would give the result i want but it doesnt .


Image

I input 2 , and the result should be "it is greater than or equal to one"

could any ching give me improvement ? If i must use case command .
thank you much !
# 2  
Old 02-01-2013
Use an if statement for this
# 3  
Old 02-01-2013
Why must you use the case construct? This smells like homework. If this were a "real world" requirement, case is not required here, an if/else would do the job.

In any case, your syntax is totally invalid.
# 4  
Old 02-01-2013
Quote:
Originally Posted by zazzybob
Why must you use the case construct? This smells like homework. If this were a "real world" requirement, case is not required here, an if/else would do the job.

In any case, your syntax is totally invalid.
..that is not homework . I know how to do it in using if command . I know there are a lot of kids looking for stuff and they dont wanna pay for it .

Code:
#!/bin/sh
if [ $1 -ge 1 ]
then
echo "it is greater than or equal to 1"
else
echo " it is little than 1"
fi

---------- Post updated at 05:35 AM ---------- Previous update was at 05:34 AM ----------

i said I must use case command because i wanna try sth new and whether it is possible .
Program needs new creation* , right ?

Last edited by Scrutinizer; 02-01-2013 at 06:48 AM.. Reason: code tags
# 5  
Old 02-01-2013
UNIX (and its shells) provides appropriate tools for a myriad of tasks. In this instance, the if/else construct is appropriate.

Try a different example using case if you want to learn how it works - for example having a user answer yes/no to a question and then having case decide what to do based upon the user response.
# 6  
Old 02-01-2013
Quote:
Originally Posted by zazzybob
UNIX (and its shells) provides appropriate tools for a myriad of tasks. In this instance, the if/else construct is appropriate.

Try a different example using case if you want to learn how it works - for example having a user answer yes/no to a question and then having case decide what to do based upon the user response.
ok..um thx .
i will ..um make more practices and learn more .
# 7  
Old 02-01-2013
zazzybob is correct... I think you have to keep in mind case works a bit like grep: it tried to match a variable with given values that means patterns vs conditions
And so what you are trying will not work...
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