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1.
Adding two 2-d arrays
2. Subtracting two 2-d arrays
3. Multiplying two 2-d arrays
4. Check whether two 2-d arrays are
equivalent or not
5. Display upper triangular matrix
6. Display lower triangular matrix
7. Display and find sum of diagonal
elements of a 2-d array
8. Display and find the row-wise
sum of a 2-d array
9. Display and find the column-wise
sum of a 2-d array
10. Quit