2.6. Python Numbers

Python numbers data type are 3 types:

1. int

2. float

3. complex

2.6.1. Int

int is a whole number, positive or negative, without decimals, of unlimited length.

# Example:
x = 1
y = 35656222554887711
z = -3255522
print(type(x))
print(type(y))
print(type(z))

<class 'int'>
<class 'int'>
<class 'int'>

2.6.2. Float

float, or “floating point number” is a number, positive or negative, containing one or more decimals.

# Example:
x = 1.10
y = 1.0
z = -35.59
print(type(x))
print(type(y))
print(type(z))

<class 'float'>
<class 'float'>
<class 'float'>

float can also be scientific numbers with an “e” to indicate the power of 10.

# Example:
x = 35e3
y = 12E4
z = -87.7e100
print(type(x))
print(type(y))
print(type(z))

<class 'float'>
<class 'float'>
<class 'float'>

2.6.3. Complex

complex numbers are written with a “j” as the imaginary part.

# Example:
x = 3+5j
y = 5j
z = -5j
print(type(x))
print(type(y))
print(type(z))

<class 'complex'>
<class 'complex'>
<class 'complex'>

2.6.4. Type Conversion

Python Numbers data type can be converted into another data type.

# Example:
x = 1    # int
y = 2.8  # float
z = 1j   # complex

# convert from int to float:
a = float(x)
print("Type of  a is: ", type(a))

# bconvert from float to int:
b = int(y)
print("Type of  b is: ", type(b))

# convert from int to complex:
c = complex(x)
print("Type of  c is: ", type(c))

Type of  a is:  <class 'float'>
Type of  b is:  <class 'int'>
Type of  c is:  <class 'complex'>

2.6.5. Random Number

Defination: Random number is a number, which can not be predicted logically.

Python random module can be used to generate random numbers.

# Example:
import random
print(random.randrange(1, 10))

7