Python Numbers

As mentioned in Python Data types section, Python provides the support for integers, floating and complex numbers. In this section, Lets learn the Math function and type conversion methods

Round Function

Round function used to round the float number to nearest whole number

#Round Function

#Nearest whole number is 5
print( round(5.1) )

#Nearest whole number is 6
print( round(5.8) )

#Nearest even number considers for 0.5 cases
print( round(6.5) )
print( round(7.5) )

#Rounding with second argument
print( round(21.7777777777, 3) )

Output

5
6
6
8
21.778

Power Function

Power function is similar to ** operator which we have learned in arithmetic operator section

#Power Function

#Below power function similar to 2*2*2*2*2
print( pow(2, 5) )

#Below power function similar to (2*2*2*2*2)%3
print( pow(2, 5, 3) )

Output

32
2

Absolute Function

Absolute function helps to convert negative number into positive number

#Absolute Function

#Convert negative number to positive number 
print( abs(-100) )

Output

100

Type Conversion

Types conversion helps to covert the value from one data type to another data type

Two types of Type conversion in python:

1. Implicit Type Conversion
2. Explicit Type Conversion

Implicit Type Conversion Python automatically converts the value from one data type to another

#Implicit Type Conversion
num1 = 5
num2 = 3.5

result = num1 + num2
print(type(result))
print(result)

Output

<class 'float'>
8.5

Explicit Type Conversion In some cases, user requires to change the type of the data explicitly before operation

#Explicit Type Conversion
num1 = 50
num2 = "50"

result = num1 + num2
print(result)

Output

Traceback (most recent call last):
File "<string>", line 5, in <module>
TypeError: unsupported operand type(s) for +: 'int' and 'str'

Explicit conversion helps to overcome the type error

#Explicit Type Conversion
num1 = 50
num2 = int("50")

result = num1 + num2
print(result)

Output

100