Python int()

 # converting a floating-point number to its equivalent integer result = int(9.9) print('int(9.9):', result) # int(9.9): 9 

int() Syntax

The syntax of the int() method is:

 int(value, base [optional])

int() Parameters

int() method takes two parameters:

• value - any numeric-string, bytes-like object or a number
• base [optional] - the number system that the value is currently in

int() Return Value

The int() method returns:

• integer portion of the number - for a single argument value (any number)
• 0 - for no arguments
• integer representation of a number with a given base (0, 2 ,8 ,10,16)

Example 1: Python int() with a Single Argument

 # int() with an integer value print("int(123) is:", int(123)) # int() with a floating point value print("int(123.23) is:", int(123.23)) # int() with a numeric-string value print("int('123') is:", int("123"))

Output

 int(123) is: 123 int(123.23) is: 123 int('123') is: 123

In the above example, we have returned the integer equivalent of an integer number, a float number and a string value.

Example 2: int() with Two Arguments

 # converting a string (that is in binary format) to integer print("For 0b101, int is:", int("0b101", 2)) # converting a string (that is in octal format) to integer print("For 0o16, int is:", int("0o16", 8)) # converting a string (that is in hexadecimal format) to integer print("For 0xA, int is:", int("0xA", 16))

Output

 For 0b101, int is: 5 For 0o16, int is: 14 For 0xA, int is: 10

Example 3: int() for custom objects

Even if an object isn't a number, we can still convert it to an integer object.

We can do this easily by overriding __index__() and __int__() methods of the class to return a number.

The two methods are identical. The newer version of Python uses the __index__() method.

 class Person: age = 23 def __index__(self): return self.age # def __int__(self): # return self.age person = Person() 
# int() method with a non integer object person print("int(person) is:", int(person))

Output

 int(person) is: 23

In the above example, the class Person is not of the integer type.

But we can still return the age variable (which is an integer) using the int() method.

Also Read:

• Python Numbers, Type Conversion and Mathematics
• Python bin()
• Python hex()