Before understanding the concept of variables in Python, you must know how variables work in other programming languages. In C, Java, and many other programming languages, the concept of a variable is linked to memory space, and a variable is perceived as a storage box that can store some value.
Here's an example of how the concept of variables works in other programming languages:
x = 1;
In the above example, memory is allocated with the name "
x", and the value "
1" is stored there. Here, we can see the memory as a container that holds the value, as shown in the picture below.
This way, for each variable, there will be a new memory space created with the variable's name, and if we change the variable's value, then memory will be updated with the new value.
int x,y = 1;
This lets us understand how the variable works in other programming languages. But in Python, the case is different, and here a variable is seen as a tag or name tied to some value. Here is an example of how to declare a variable in Python:
x = 1
In the above Python example, a value "
1" is created in the memory, and then the tag name "
x" has been created, which is tied to the value.
If we change the variable value to a new value, a new value is created in memory, and the tag is shifted to a new one. The old value becomes un-referenced in this case, and the garbage collector removes it.
Assigning a variable to another variable creates a new tag connected to the same value.
int y = x;
In the above example, we store the value of "
x" in "
y". A new tag, "
y" will be generated, referring to the value "
In this way, we can understand how variables in Python differ from other programming languages.