Python - Typecasting

Specify a Variable Type :

There may be times when you want to specify a type on to a variable. This can be done with casting. Python is an object-orientated language, and as such it uses classes to define data types, including its primitive types.

Casting in python is therefore done using constructor functions:

• int() - constructs an integer number from an integer literal, a float literal (by removing all decimals), or a string literal (providing the string represents a whole number)
• float() - constructs a float number from an integer literal, a float literal or a string literal (providing the string represents a float or an integer)
• str() - constructs a string from a wide variety of data types, including strings, integer literals and float literals

x = int(1)     # x will be 1
y = int(2.8)   # y will be 2
z = int("3")   # z will be 3

x = float(1)     # x will be 1.0
y = float(2.8)   # y will be 2.8
z = int("3")     # z will be 3.0

x = str("s1")     # x will be 's1'
y = str(2)        # y will be '2'
z = str("3.0")    # z will be '3.0'