passing parameters to bash function code example

Example 1: pass parameters to bash script

# Run the script with the arguments as you would for
# every other command.
# Example: ./script.sh arg1 arg2 

#!/bin/sh
echo "argument1: $1"
echo "argument2: $2"

# Output: 
# argument1: arg1
# argument2: arg2

Example 2: bash function arguments

#!/usr/bin/env sh

foo 1  # this will fail because foo has not been declared yet.

foo() {
    echo "Parameter #1 is $1"
}

foo 2 # this will work.