Variables

For variables, we use the set command to declare and assign variables

Declaring, Assigning and Accessing Variables

In batch scripting, upon declaring a variable, we must initialize it immediately
To declare variables, we follow the syntax:

set varName=value

To access the value of the variable, we can enclose the variable name with %%.
Therefore, to output the value of the variable varName, we do the command:

echo %varName%

We can also assign strings with spaces into variables.
To do this, we use double quotes to group together strings.

set greet="Hello World!"

By default, variables only handle and store strings.
Therefore, numbers here are handled like strings

set userAge=19

Input Prompts

We can also request the user for input then store it inside a variable using the set /p command.

We can create an input prompt using the following syntax:

set /p varName=<promptMessage>

The prompt message is the string to be displayed when you request for input.
For example, consider the following script.

set /p age="How old are you?"
echo You are %age% years old!

Special Variables

You can also use some special predefined variables that the system already defines for you