Python in-built function and basic math library

 Python in-built function :

                  Python has many in-built function that are always available to the program . Some of them are related to mathematical operation .

• abs(x)  : Returns absolute value of x , where x is any number ( Integer/float/complex)

 Input :  
 >>>abs(-5) #integer   
 >>>abs(-63.2) # float  
 >>>abs(2-3j) #complex  
 Output :  
 >>>5  
 >>>63.2  
 >>>3.605551275463989  

• pow(x,y)   : Returns x to the power y value . x,y belongs to integer/ float

 Input :  
 >>>pow(5,2)  
 >>>pow(2.3,5.3)  
 Output:  
 >>>25  
 >>>82.6337631255409  

• min(x1 ,x2 ,x3.........) : Returns smallest argument
• max(x1,x2,x3,.........) : Returns largest argument
• bin(x)  : Returns binary equivalent number of integer decimal number

 Input :  
 >>>min(3,62,89,64,1,5,9)  
 >>>max(63,56,96,56,47,20)  
 >>>bin(2)  
 Output :  
 >>>1  
 >>>96  
 >>>'0b10'  

Python Library :

                 In python programming language there is various library for various operation . we will discuss later in this tutorial . Now , we will limited only two important mathematical library which are math for mathematics function and cmath for complex mathematics operation .

• To use any library in python , we have import those library .

 import math  

                                                                 or

 import cmath  

• Mathematical function in math module :

1. pi , e = constants value
2. sqrt(x) = return square root value
3. factorial(x) = return factorial value 
4. lox(x) = return natural log value of x
5. log10(x) = return base-10 value of logarithm
6. degrees(x) =returns radians to degrees
7. radians(x) = return degrees to radians
8. sin(x) = return sin(x) value in radians
9. cos(x)=return cos(x) value in radians
10. tan(x) = return tangent value in radians

• Similarly , sinh(x) ,cosh(x) and tanh(x) is for hyperbolic function .
• asin(x) ,acos(x) and atan(x) for inverse function in radians .

If you run this way :

 Input :  
 >>>import math  
 >>>print(pi)  
 Output :  
 >>>Traceback (most recent call last):  
  File "<pyshell#1>", line 1, in <module>  
   print(pi)  
 NameError: name 'pi' is not defined  

This will show error . The right way to import python module/library is :

 Input :  
 >>>import math  
 >>>print(math.pi)  
 Output :  
 >>>3.141592653589793  

To use any library in python  , firstly we have to import library and for use we have to call the library/module .

 

Next->   Python Random Function