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pow() in Python

  • Difficulty Level : Basic
  • Last Updated : 22 Sep, 2021

Python pow() function returns the power of the given numbers. This function computes x**y. This function first converts its arguments into float and then computes the power. 

Syntax: pow(x,y)

Parameters : 

  • x : Number whose power has to be calculated.
  • y : Value raised to compute power.

Return Value :  Returns the value x**y in float.

Python pow() example

Example 1: Working of pow()

Python3




# Python code to demonstrate pow()
# version 1
 
print("The value of 3**4 is : ", end="")
 
# Returns 81
print(pow(3, 4))

Output: 



The value of 3**4 is : 81.0

Example 2: Python pow() with three argument

float pow(x,y,mod) function computes (x**y) % mod. This function first converts its arguments into float and then computes the power. 

Syntax: float pow(x,y,mod)

Parameters : 

  • x : Number whose power has to be calculated.
  • y : Value raised to compute power.
  • mod :  Value with which modulus has to be computed.

Return Value :  Returns the value (x**y) % mod in float.

Python3




# Python code to demonstrate pow()
# version 2
 
print("The value of (3**4) % 10 is : ", end="")
 
# Returns 81%10
# Returns 1
print(pow(3, 4, 10))

Output: 

The value of (3**4) % 10 is : 1

Implementation Cases in pow() : 

 

Python3




# Python code to discuss negative
# and non-negative cases
 
# positive x, positive y (x**y)
print("Positive x and positive y : ", end="")
print(pow(4, 3))
 
print("Negative x and positive y : ", end="")
# negative x, positive y (-x**y)
print(pow(-4, 3))
 
print("Positive x and negative y : ", end="")
# positive x, negative y (x**-y)
print(pow(4, -3))
 
print("Negative x and negative y : ", end="")
# negative x, negative y (-x**-y)
print(pow(-4, -3))

Output:

Positive x and positive y : 64
Negative x and positive y : -64
Positive x and negative y : 0.015625
Negative x and negative y : -0.015625

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