The value in the variable "num" can be replaced in another line of code.
i.e.
But, what if you intend to update the value in a variable instead of replacing it?
For instance, you might want to increase the value stored in a variable, so instead of replacing the value, you can easily update it. This process is known as Modify-in-place.
Modify-in-place works with all arithmetic operators.
For addition: "+="
For subtraction: "-="
For multiplication: "*="
For division: "/="
For exponentiation: "**="
For modulus: "%="
In summary, modify-in-place is a process that makes code look neat and shorter.