Matrix Multiplication From Scratch | Dataford Interview Questions

Implement a function to perform matrix multiplication from scratch. Use the signature matrix_multiply(A, B), where A and B are non-empty rectangular lists of numbers, and return a new matrix containing their product without modifying either input. If A has shape m x n, B must have shape n x p, and the result has shape m x p; for example, [[1, 2]] multiplied by [[3], [4]] returns [[11]].

Constraints

A and B are non-empty rectangular matrices represented as lists of lists.
If A has shape m x n, B has shape n x p.
1 <= m, n, p <= 100
Matrix entries are integers in the range -10^9 to 10^9.
Return a new matrix and do not modify A or B.

Function Signature

def matrix_multiply(A, B):

Your question is Matrix Multiplication From Scratch. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

A and B are non-empty rectangular matrices represented as lists of lists.
If A has shape m x n, B has shape n x p.
1 <= m, n, p <= 100
Matrix entries are integers in the range -10^9 to 10^9.
Return a new matrix and do not modify A or B.

Function Signature

def matrix_multiply(A, B):

Your question is Matrix Multiplication From Scratch. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.