Python Data Type Continued [[Pytho numbers]

 

Python Numeric Data Type

Python numeric data types store numeric values. Number objects are created when you assign a value to them. For example −

var1 = 1
var2 = 10
var3 = 10.023

Python Numbers

There are three numeric types in Python:

• int
• float
• complex

Variables of numeric types are created when you assign a value to them:

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

To verify the type of any object in Python, use the type() function:

x = 1

y = 2.8

z = 1j

print(type(x))

print(type(y))

print(type(z))

Int

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

Integers:

x = 1
y = 35656222554887711
z = -3255522

print(type(x))
print(type(y))
print(type(z))

Float

Float, or "floating point number" is a number, positive or negative, containing one or more decimals.

x = 1.10

y = 1.0

z = -35.59

print(type(x))

print(type(y))

print(type(z))

Float can also be scientific numbers with an "e" to indicate the power of 10.

x = 35e3

y = 12E4

z = -87.7e100

print(x)

print(type(y))

print(type(z))

---------------------------------

Complex

Complex numbers are written with a "j" as the imaginary part:

x = 3+5j

y = 5j

z = -5j

print(x)

print(type(y))

print(type(z))

Type Conversion

You can convert from one type to another with the int(), float(), and complex() methods:

Example

Convert from one type to another:

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

#convert from int to float:
a = float(x)

#convert from float to int:
b = int(y)

#convert from int to complex:
c = complex(x)

print(a)
print(b)
print(c)

print(type(a))
print(type(b))
print(type(c))

Try it Yourself »

Note: You cannot convert complex numbers into another number type.

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https://www.w3schools.com/python/exercise.asp?filename=exercise_numbers1

Excercise