Casting in Python

Lesson#11

Casting is used in Python to specify data type of a variable or convert data of one data type to another.

Being object-oriented programming language, Python uses classes to define data types. Casting is performed using constructor functions of these classes. These constructors are

• int() — constructs an integer number
• float() — constructs a float number f
• str() — constructs a string

Examples:

# int examples
x = int(11)   # value of x is 11
y = int(10.5) # value of y is 10
z = int("44") # value of z is 44

# float examples
x = float(12)     # 12.0 
y = float(3.9)   # 3.9
z = float("5.8")   # 5.8

# str examples
x = str("orange") # value of x is 'orange'
y = str(20)    # value of y is '20'
z = str(14.5)  # value of z is '14.5'