Table of Contents
The int() method returns an integer object from any number or string.
The syntax of int()
method is:
int(x=0, base=10)
1. int() Parameters
int()
method takes two arguments:
- x – Number or string to be converted to integer object.
The default argument iszero
. - base – Base of the number in x.
Can be 0 (code literal) or 2-36.
2. Return value from int()
int()
method returns:
- an integer object from the given number or string treats default base as 10
- (No parameters) returns 0
- (If base given) treats the string in the given base (0, 2, 8, 10, 16)
3. Example 1: How int() works in Python?
# integer print("int(123) is:", int(123)) # float print("int(123.23) is:", int(123.23)) # string print("int('123') is:", int('123'))
Output
int(123) is: 123 int(123.23) is: 123 int('123') is: 123
4. Example 2: How int() works for decimal, octal and hexadecimal?
# binary 0b or 0B print("For 1010, int is:", int('1010', 2)) print("For 0b1010, int is:", int('0b1010', 2)) # octal 0o or 0O print("For 12, int is:", int('12', 8)) print("For 0o12, int is:", int('0o12', 8)) # hexadecimal print("For A, int is:", int('A', 16)) print("For 0xA, int is:", int('0xA', 16))
Output
For 1010, int is: 10 For 0b1010, int is: 10 For 12, int is: 10 For 0o12, int is: 10 For A, int is: 10 For 0xA, int is: 10
5. Example 3: int() for custom objects
Internally, int()
method calls an object’s __int__()
method.
So, even if an object isn’t a number, you can convert the object into an integer object.
You can do this by overriding __index__()
and __int__()
methods of the class to return a number.
These two methods should return the same value as older versions of Python uses __int__()
, while newer uses __index__()
method.
class Person: age = 23 def __index__(self): return self.age def __int__(self): return self.age person = Person() print('int(person) is:', int(person))
Output
int(person) is: 23
Related posts:
Python Keywords and Identifiers
Python Program to Make a Flattened List from Nested List
Python Program to Find Sum of Natural Numbers Using Recursion
Python callable()
Python oct()
Python List sort()
Python String isprintable()
Python String rpartition()
Python Program Read a File Line by Line Into a List
Python print()
Python String splitlines()
Python type()
Python dir()
Python bool()
Python String capitalize()
Python max()
Python set()
Python Deep Learning Cookbook - Indra den Bakker
Python Program to Find the Factorial of a Number
Python __import__()
Python Sets
Python Program to Check Leap Year
Python *args and **kwargs
Python bin()
Python Statement, Indentation and Comments
Python filter()
Python Dictionary copy()
Python @property decorator
Python String index()
Python Directory and Files Management
Python Program to Convert Decimal to Binary, Octal and Hexadecimal
Python Dictionary