Python Variables - Python Programming

Python Variable Data Types

Variables are nothing but reserved memory for storing data. Based on the data type interpreter allocates the memory. Python Variable are similar to JavaScript Variables. Unlike Python is Loosely-Coupled which means we can declare a variable without defining its data type.

Python have different data types:

  1. Number: Integer, Float, Complex
  2. String
  3. List
  4. Tuple
  5. Dictionary
Python Variable Video Tutorial

Assigning Values to (Variables Python Variables)

x = 3             # Float
y = "StudyGyaan"  # String
z = 2.15          # Float

Variables do not need to be declared with any particular data type and can even change type after they have been declared and stored.

x = 5
x = "StudyGyaan"

Multiple Assignment 

In python, variable values can be assigned multiple time

x = y = z = 786

Rules for Initialising Variables or Identifiers in Python

A python identifier starts with A to Z or a to z or an underscore( _ ) followed by zero or more letters, underscores, and digits (0 to 9).

Allowed Identifiers: A, a, _a, _A123, _123, etc.

Not Allowed Identifiers: 123, $ads, etc.

Output Variables

Python variables are basically output using the print statement. We can use + symbol to concate two strings and add two number.

x = "awesome"        # String
print("Python is " + x)
# Output: Python is awesome
x = 5.5              # Float
y = 10               # Integer
print(x + y)
# Output: 15.5

If you try to combine string and number, it will throw an error:

x = "Beginners Guide"
y = 10
print(x + y)
#Output: TypeError: unsupported operand type(s) 
# for +: 'int' and 'str'

Whats Next – Python Strings