Mathematical Constants
e
The mathematical constant e is called as Euler's Number.
Syntax
math.e
Return Value
The math.e constant equals Euler's Number.
Example
from math import e
print ("Euler's Number: ",e)
It will produce the following output −
Euler's Number: 2.718281828459045
pi
In mathematics, pi (denoted as Π ) is a mathematical constant, equal to the ratio of circumference of a circle to its diameter.
Syntax
math.pi
Return Value
The math.pi constant returns circumference/diameter.
Example
from math import pi
print ("Mathematical constant Π: ",pi)
It will produce the following output −
Mathematical constant Π: 3.141592653589793
tau
In Mathematics, Tau (denoted by τ ) is defined as a mathematical constant equivalent to the ratio of circumference to radius, and is equal to 2Π.
Syntax
math.tau
Return Value
The math.tau returns circumference/radius.
Example
from math import tau
print ("Mathematical constant τ : ",tau)
It will produce the following output −
Mathematical constant τ : 6.283185307179586
inf
This mathematical constant is equivalent to positive infinity. For negative infinity use - math.inf. This equivalent to float("Inf").
Syntax
math.inf
Return Value
The constant returns the positive infinity.
Example
from math import inf
print ("Positive infinity: ",inf, "is equal to", float("Inf"))
print ("Negative infinity: ",-inf, "is equal to", float("-Inf"))
It will produce the following output −
Positive infinity: inf is equal to inf Negative infinity: -inf is equal to -inf
nan
This constant is a floating-point "not a number" (NaN) value. Equivalent to the output of float('nan').
Syntax
math.nan
Return Value
This constant returns NaN standing for not a number.
Example
from math import nan
print ("Not a number:", nan, "is equal to", float("nan"))
It will produce the following output −
Not a number: nan is equal to nan