Python – math.prod() method

Math module in Python contains a number of mathematical operations, which can be performed with ease using the module. math.prod() method in Python is used to calculate the product of all the elements present in the given iterable. Most of the built-in containers in Python like list, tuple are iterables. The iterable must contain numeric value else non-numeric types may be rejected.
This method is new in Python version 3.8.

Syntax: math.prod(iterable, *, start = 1)

Parameters:
iterable: an iterable containing numeric values
start: an integer representing the start value. start is a named (keyword-only) parameter and its default value is 1.

Returns: the calculated product of all elements present in the given iterable.

Code #1: Use of math.prod() method

# Python Program to explain math.prod() method

# Importing math module
import math

# list
arr = [1, 2, 3, 4, 5]

# Calculate the product of
# of all elements present
# in the given list
product = math.prod(arr)
print(product)


# tuple
tup = (0.5, 0.6, 0.7)

# Calculate the product
# of all elements present
# in the given tuple
product = math.prod(tup)
print(product)


# range
seq = range(1, 11)

# Calculate the product
# of all elements present
# in the given range
product = math.prod(seq)
print(product)

# As the start value is not specified
# it will default to 1

Output:

120
0.21
3628800

Code #2: if start parameter is explicitly specified

# Python Program to explain math.prod() method

# Importing math module
import math


# By default start value is 1
# but can be explicitly provided
# as a named (keyword-only) parameter

# list
arr = [1, 2, 3, 4, 5]

# Calculate the product of
# of all elements present
# in the given list
product = math.prod(arr, start = 2)
print(product)

Output:

240

Code #3: When the given iterable is empty

# Python Program to explain math.prod() method

# Importing math module
import math

# If the given input iterable
# is empty, then this method
# returns the start value

# list
arr = []

# Calculate the product of
# of all elements present
# in the given list
product = math.prod(arr)
print(product)


# Tuple
tup = ()

# Calculate the product of
# of all elements present
# in the given tuple
product = math.prod(tup, start = 5)
print(product)

Output:

1
5

Reference: Python math library