Thank you for the excellent help you give to python programmers. This program should put i*j in a 2x2 matrix. It does not. #xy.py #Program to put i*j [indexes] in a 2x2 matrix mat=[][] for i =0: for j in range(0,1): mat[0][j] = i*j for j=0: for i in range(0,1): mat[i][0] = i*j print(mat) Thank you in advance. Ethan Rosenberg