More Problems

• Find the sum of elements at even indices in an array.
• Check if a given matrix is a lower triangular matrix.
• Check if a given matrix is an upper triangular matrix.
• Find the number of positive and negative numbers in an array.
• Count the number of perfect squares in an array.
• Check if a given matrix is diagonal (all non-diagonal elements are zero).
• Find the sum of the first half of an array.
• Find the sum of the second half of an array.