Data Types

In any computer programming language, data type defines how a data store in memory. How much memory size occupied by a data is also determined by data types. Like other languages Python has also the following built-in data types.

Variables

A variable is named memory location. That means a variable basically allocates a memory location, which is mapped with a name called variable name. In python, we can declare a variable without any data type. But its data type was set just after we assign a value to it.

Rules of a variable names

• A variable name must start with a letter or the underscore character.
• A variable name cannot start with a number.
• A variable name can only contain alpha-numeric characters and underscores
• Variable names are case-sensitive (Name, name and NAME are three different variables)

Assign multiple variables with multiple values in one line

We can assign multiple values in different variables in a line.

x,y,z=10,20,30

This line is equivalent to

x=10

y=20

z=30

Assign multiple variables with the same value

x=y=z=10

This line is equivalent to

x=10

y=10

z=10