how to pass variable by reference in python
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in python, variables are typically passed by object reference. this means that when you pass a variable to a function, you are actually passing a reference to the object the variable points to, rather than the actual value. however, there are scenarios where you might want to modify the contents of a variable directly within a function and have those changes reflected outside the function. in such cases, you can use mutable objects or other techniques to achieve a similar effect.
here's a tutorial on how to pass variables by reference in python, along with a code example:
in python, all arguments are passed by object reference. however, the distinction between passing by reference and passing by value becomes apparent when dealing with mutable and immutable objects.
immutable objects, such as integers, strings, and tuples, cannot be modified in place. when you pass an immutable object to a function, any changes made to it inside the function will not affect the original object outside the function.
mutable objects, such as lists and dictionaries, can be modified in place. changes made to a mutable object within a function will be reflected in the original object outside the function.
let's explore both scenarios with examples.
in this example, original_num is an integer (an immutable object). the function
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