How to multiply a range in Python

Borislav Hadzhiev

Last updated: Jul 9, 2022

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**Use a list comprehension to multiply each number in a range by specific
number, e.g. result = [num * 2 for num in range(1, 6)]. The list comprehension
iterates over the range and uses the multiplication * operator to multiply the
current number by another number.**

main.py

`import math result = [num * 2 for num in range(1, 6)] # ✅ multiply each number in range by specific number print(result) # 👉️ [2, 4, 6, 8, 10] # ------------------------------------------------------- # ✅ multiply all numbers in a range print(math.prod(range(1, 5))) # 👉️ 24 (same as 1 * 2 * 3 * 4)`

We used a list comprehension to iterate over a range and multiply its values by another number.

List comprehensions are used to perform some operation for every element, or select a subset of elements that meet a condition.

The range class is
commonly used for looping a specific number of times in `for`

loops and takes
the following arguments:

Name | Description |
---|---|

`start` | An integer representing the start of the range (defaults to `0` ) |

`stop` | Go up to, but not including the provided integer |

`step` | Range will consist of every N numbers from `start` to `stop` (defaults to `1` ) |

Notice that the `start`

value in the range is inclusive, whereas the `stop`

value is exclusive.

main.py

`# 👇️ [1, 2, 3, 4, 5] print(list(range(1, 6)))`

If you only pass a single argument to the `range()`

constructor, it is
considered to be the value for the `stop`

parameter.

main.py

`# 👇️ [0, 1, 2, 3, 4, 5] print(list(range(6)))`

The example shows that if the

`start`

argument is omitted, it defaults to `0`

and if the `step`

argument is omitted, it defaults to `1`

.If the value for the `stop`

parameter is lower than the value for the `start`

parameter, the range will be empty.

main.py

`# 👇️ [] print(list(range(6, 1)))`

**Use the math.prod() method to multiply all of the numbers in a range, e.g.
math.prod(range(1, 5)). The math.prod method calculates the product of all
of the items in the iterable.**

main.py

`import math print(math.prod(range(1, 5))) # 👉️ 24 (same as 1 * 2 * 3 * 4) print(math.prod(range(1, 4))) # 👉️ 6 (same as 1 * 2 * 3)`

The math.prod method calculates the product of all the elements in the provided iterable.

main.py

`import math my_tuple = (5, 5, 5) result = math.prod(my_tuple) print(result) # 👉️ 125`

The method takes the following 2 arguments:

Name | Description |
---|---|

iterable | An iterable whose elements to calculate the product of |

start | The start value for the product (defaults to `1` ) |

If the iterable is empty, the `start`

value is returned.