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Python pow()

The pow() method computes the power of a number by raising the first argument to the second argument

Example

# compute 3^4 print(pow(3, 4)); # Output: 81

pow() Syntax

The syntax of pow() is:

pow(number, power, modulus [optional])

pow() Parameters

The pow() method takes three parameters:

• number- the base value that is raised to a certain power
• power - the exponent value that raises number
• modulus - (optional) divides the result of number paused to a power and finds the remainder: number^power% modulus

pow() Return Value

The pow() method returns:

• number^power - number, raised to a certain power
• number^power % modulus - with the modulus argument
• 1 - if the value of power is 0
• 0 - if the value of number is 0

Example 1: Python pow()

# returns 2^2 print(pow(2, 2)) # returns -2^2 print(pow(-2, 2)) # returns 1/2^2 print(pow(2, -2)) # returns -1/-2^2 print(pow(-2, -2))

Output

4 4 0.25 0.25

The pow() method helps us find the value of a number raised to a certain power.

In the above example,

• pow(2,2) is 22 - results in 4
• pow(-2,2) is -22 - results in -4
• pow(2,-2) is 1/22 - results in 0.25
• pow(-2,-2) is -1/-22 - results in 0.25

Example 2: pow() with Modulus

x = 7 y = 2 z = 5 # compute x^y % z print(pow(x, y, z))

Output

4

In the above example, we have raised the number 7 to the power 2 which results in 49.

Since we have used the pow() method with three arguments x, y, and z, the third argument 5 divides the result of 72 and finds the remainder.

That's why we get the output 4.

Also Read:

• Python id()
• Python int()
• Python Program to Compute the Power of a Number

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