Скачать или смотреть Python For Beginners in 3 Minutes | Variable Types and Value Assignments Part 3

Variable Types and Assignments

Unlike some programming languages, Python does not require a variable to be declared with any particular data type first before it can hold a value.

In Python, a variable is created as soon as a value is assigned to it. The value assigned to the variable determines the data type.

counter = 0

At this point, a variable is created with a name "counter" clearly is an "integer" having an initial value of zero, if this the first time this variable is used.

Interestingly, Python allows any existing variable to change its type when you assign a new value to it. For example:

counter = 0
print(counter)
print(type(counter))

counter = "Hello"
print(counter)
print(type(counter))

The variable

counter

was initially of type or class "int" or integer when it was assigned a value of 0.

The next assignment of value to the counter changes its type into a type or class "str" or string.

Further down our code we can also assign to the same variable the type or class "float" or numbers with decimal places.

counter = 9.39
print(counter)
print(type(counter))

Let's try another type or class of data that can be stored in a variable. It is called "boolean" and can store either True or False values. Using the same variable:

counter = True
print(counter)
print(type(counter))

*Assigning one value to multiple variables.
If you want to store one value to different variables, the following Python code can do it without any issue:

fruit1 = fruit2 = fruit3 = "Strawberry"

*Assigning multiple values to multiple variables.

One of the cool things I have learned in Python is the different ways it assigns values to variables. We have seen so far that we use the "equal" sign to assign one value to one variable. Say we have the following assignments:

fruit1 = "Mango"
fruit2 = "Apple"
fruit3 = "Cherry"
print(fruit1)
print(fruit2)
print(fruit3)

The preceding code may be written as follows:

fruit1, fruit2, fruit3 = "Mango", "Apple", "Cherry"
print(fruit1)
print(fruit2)
print(fruit3)

This way we are assigning values to multiple variables in just one line of code instead of three.

*Assigning one value to multiple variables.
If you want to store one value to different variables, the following Python code can do it without any issue:

fruit1 = fruit2 = fruit3 = "Strawberry"
print(fruit1)
print(fruit2)
print(fruit3)

*Another way to store data to variables is to "unpack" a collection like a list or a set. The following code stores the values from the list into the respective variables.

fruits = ["Mango", "Apple", "Cherry"]
fruit1, fruit2, fruit3 = fruits
print(fruit1)
print(fruit2)
print(fruit3)

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Music Credit: See You On The Otherside - The 126ers
   / @hutchinw  

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