how to use in function in bash code example

Example 1: bash function

#!/bin/bash 
                
                #Call a function without arguments
                function quit {
                   exit
                }
                
                #Call a function with arguments
                function e {
                    echo $1 #$1 will be set to the first argument given
                }

Example 2: how to make a function in bash

function_name () {
<commands>
}