Bash scripting

PART $1$: You will create a script that demonstrates various scripting concepts, including echoing text, using variables, and displaying built$-$in variables.

The script needs to do the following:

Display "Scripting is fun $!"$

Define two variables: variable$1$ with the value "Hello" and variable$2$ with the value "Bash".

Create a greeting using the defined variables and echo it with the message "Hello, welcome to the world of Bash scripting!".

Use built$-$in variables to display:

Your current bash path

The Bash version you are using

The PID of the bash process

Your home directory

Your current working directory

Your hostname

PART $2$:

Write a script that will count how many executable commands are in your current PATH. The script needs to count the number of executable files rather than just number of files. When finished, it needs to display number of commands and nonexecutables are in the default PATH $.$

Here is the output from my machine $($Mac$)$:

adi$\_$z$ $./$count$\_$commands.sh

$1436$ commands, and $8$ entries that weren't executable

PART $3$:

In this part you will write a Bash script that simulates a simple calculator. The script needs to have a function called MY$\_$CALC that can process user input such as this:

$1$ plus $4$

$8$ minus $1$

$2$ times $5$

$6$ divided$-$by $4$