Explanation for nested for loops in my js code about matrix

Question

Can someone give a detailed explanation about the createMatrix and multiplyMatrix function in my code? especially the for loops.

I am trying to understand how the logic works but it is too complicated for me.
Here is the link to my code thank you:

https://code.sololearn.com/WNROs9AJtv8B/?ref=app

Answer 1

Sure, I can help explain the createMatrix and multiply functions in the provided code. Please refer my both answers

createMatrix function:
This function is used to create a matrix of given dimensions and fill it with user input values. Here is a step-by-step explanation of how it works:
The function takes in rows, cols, and matrixNum as parameters. matrixNum is used to differentiate between the two matrices being created.
An empty array matrix is initialized.
The function loops through rows number of times, and for each iteration, it pushes an empty array into the matrix array. This creates a 2D array with rows number of rows and cols number of columns.
The inner loop then runs cols number of times, and for each iteration, it prompts the user to input a value for the current matrix element.
The input value is then parsed into an integer using parseInt().
Finally, the function returns the completed matrix.

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Answer 2

multiply function:
This function takes in two matrices as parameters and returns their matrix product. Here's how it works:
The function first gets the dimensions of the input matrices.
It initializes an empty result array with the same number of rows as the first matrix and the same number of columns as the second matrix.
It then loops through each row of the first matrix using rows1 and initializes an empty array for the current row in result.
The inner loop then runs cols2 number of times to iterate through each column of the second matrix.
For each result[i][j] element, it loops through the cols1 elements in the current row of the first matrix and multiplies each element with the corresponding element in the rows2 of the second matrix.
It then adds up these products to get the dot product of the two vectors and assigns this value to the current result[i][j] element.
Finally, the function returns the completed result matrix.

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