UNIX : how to write function in bash

Hi . Most of the time we need to call a certain block of code multiple time. We group them together under a function and call it from where ever we need from main body of program. Here an example is shown on how to define and call a function in bash shell scripting.

#/usr/bin/bash

function sub_function
{
        echo "Statement printing from function block"
}


echo "Example of function"
echo "Before function call"
sub_function
echo "After function call"

Output of above code snippet

> bash function.bash

Example of function
Before function call
Statement printing from function block
After function call