[SOLVED] {} vs () in a function

yashfire007 · 08-25-2014, 01:21 AM

Hi to all,

function hai ()
{
printf "hai \n"
}

function hai ()
(
printf "hai \n"
)

Please explain me, what the difference it makes when using {} or () for body of the function.

Thanks in Advance

jdkaye · 08-25-2014, 01:43 AM

Until you get a better answer, I'll say the following:
() enclose the arguments to the function.
{} enclose the body of the function; the series of operations performed by the function; what the function actually does.

jdk

pan64 · 08-25-2014, 01:47 AM

you can see when you execute a command to display defined functions (that is: type <name>):

Code:

# the first one will be:
hai () 
{ 
    printf "hai \n"
}


# the second one:
hai () 
{ 
    ( printf "hai \n" )
}

( ) will invoke an additional shell

yashfire007 · 08-25-2014, 02:25 AM

Quote:

Originally Posted by pan64

you can see when you execute a command to display defined functions (that is: type <name>):

Code:

# the first one will be:
hai () 
{ 
    printf "hai \n"
}


# the second one:
hai () 
{ 
    ( printf "hai \n" )
}

( ) will invoke an additional shell

So it means while using (), it uses subshells for every function enclosed by ()
But {} uses the same shell for all the functions enclosed by {}

Am i correct?

pan64 · 08-25-2014, 02:29 AM

yes, it looks like - but I have never used the version with ()