How do i use functions in bash?

giraffelife

You can use functions in one of two ways in bash. I know it is a function by using the parentheses "( )" so prefer the second method, anything to get away with less typing!

function functname
               {
               shell commands
               }

or

 functname( )
{
    shell commands
               }

e.g:
Create a file bash.function, add the function called printmsg to the file, run the script.

$ cat bash.function

printmsg()
{ 
 echo "Hello World"
}

printmsg

$ chmod +x bash.function.sh 
$ ./bash.function.sh 
Hello World