2d array entering value and sayings its a diagnol

Sure, here is an example of a 2D array in Python where we will enter values and then check if it is a diagonal matrix:

```python

# Function to check if a matrix is diagonal

def is_diagonal(matrix):

rows = len(matrix)

cols = len(matrix[0])

for i in range(rows):

for j in range(cols):

if i != j and matrix[i][j] != 0:

return False

return True

# Taking input for the 2D array

rows = int(input("Enter the number of rows: "))

cols = int(input("Enter the number of columns: "))

matrix = []

for i in range(rows):

row = []

for j in range(cols):

value = int(input(f"Enter the value at position ({i}, {j}): "))

row.append(value)

matrix.append(row)

# Printing the matrix

print("Entered Matrix:")

for row in matrix:

print(row)

# Checking if the matrix is diagonal

if is_diagonal(matrix):

print("The entered matrix is a diagonal matrix.")

else:

print("The entered matrix is not a diagonal matrix.")

```

You can run this code in a Python environment and enter the values for the 2D array. The code will then check if the entered matrix is a diagonal matrix or not.

Above is 2d array entering value and sayings its a diagnol.