added returning value to the function

Author: apoorvd06

matrix/transpose_of_matrix.py

@@ -18,7 +18,7 @@
 """
 
 
-def transpose(matrix):
+def transpose(matrix: list[list[int]]) ->list[list[int]]:
     # create a null matrix of same dimension of given matrix
     trans = [[0] * len(matrix) for _ in range(len(matrix[0]))]
     for i in range(len(matrix)):