Discussion on: Spiral Matrices with Julia

def main():
    n = 4
    Matrix = generateEmptyMatrix(n)

    generateMatrix(Matrix, n, 0, 0, n, n)

def generateMatrix(matrix, dimension, startRow, startColumn, endRow, endColumn, counter=10, delta=0):
    if dimension == 1:
        matrix[startRow][startColumn] = counter
        return displayMatrix(matrix)
    if dimension == 2:
        # GENERATE FIRST ROW
        for i in range(startRow, endRow):
            matrix[startRow][i] = counter
            counter += 1
        # GENERATE LAST ROW
        for i in range(2):
            matrix[startRow+1][startRow+1 -i] = counter
            counter += 1
        return displayMatrix(matrix)
    else:
        # GENERATE FIRST ROW
        for i in range(startRow, endRow):
            matrix[startRow][i] = counter
            counter += 1
        # GENERATE LAST COLUMN
        for i in range(startColumn+1, endColumn):
            matrix[i][endColumn - 1] = counter
            counter += 1
        # GENERATE LAST ROW
        for i in range(startRow + 1, endRow):
            matrix[endRow - 1][endColumn - 1 - i + delta] = counter
            counter += 1
        # GENERATE FIRST COLUMN
        for i in range(startRow + 1, endColumn - 1):
            matrix[endRow - 1 - i + delta][startColumn] = counter
            counter += 1
        return generateMatrix(matrix, dimension - 2, startRow + 1, startColumn + 1, endRow - 1, endColumn - 1, counter, delta + 1)

[10, 11, 12, 13]
[21, 22, 23, 14]
[20, 25, 24, 15]
[19, 18, 17, 16]