The very first thing you have to learn when starting with python programming is python variables. If you want to get a basic understanding of python read:

Start with this If you are a Python Beginner

Python Variables are those we used in Mathematics, like Find X.

Well in mathematics the value of X vary that's why we call them variables. In Python, their value varies that's why we call them variables.

to declare a variable in python you can use this statement:

a = 10

Here we use = because it is an assignment operator, it will give the value in right to the variable a in left. You can say that value of variable a is 10

How exactly Python will know the type of the variable?

Here python using Dynamic Data Types to identify the type of variable. That means the name a is just referring to the value 10

Python treats the value 10 as an object. An object has the property of holding a memory slot of any size. We don't have to specify the type of it.

How do we know the type of the variable?

Python has a built-in function type() which returns the type of the variable like this.

a = 10
print(type(a))

Output:

class < ' int ' >

The type of the variable a is an integer.

a = 10.5
print(type(a))

Output:

class < ' float ' >

The type of the variable a is decimal we call it float.

a = 'India'
print(type(a))

Output:

class < ' str ' >

The type of the variable a is a set of characters we call string.

Type Casting

Can we convert the type of one variable into another type?

Yes we can use python built-in functions: int() float() str()

Let's convert one type into another

a = 10.5
print(a)
print(type(a))
b = int(a)
print(b)
print(type(b)

Output:

10.5

class < ' float ' >

10

class < ' int ' >

These were some examples of python variables.