Python | cmath.pi constant
With the help of cmath.pi constant, we can use this constant value in the calculation of area of circle, perimeter of circle and etc.
Syntax :
cmath.pi
Return : Return the pi value.
Example #1 :
In this example we can see that by using cmath.pi constant, we are able to drive the mathematical formulas very easily.
# importing cmath library import cmath   r = 5# using cmath.pi constant gfg = cmath.pi * r*r   print(gfg) |
Output :
78.53981633974483
Example #2 :
# importing cmath library import cmath   r = 3# using cmath.pi constant gfg = 2 * cmath.pi * r   print(gfg) |
Output :
18.84955592153876
