It is an array with the same number of rows and columns.
4th
Yes, if it is described as such.
Yes, a unit array.
A square is called "second power" because a square number is a number, in which its factors are "2" of the same number, ( ex, 1 x 1, 2 x 2, 3 x 3,etc). So, in other words, the "first" factor is a certain number, and the "second" number is the same number. You are using the same number 2 times in order to get the product, which is the square number.A square number physically forms a square. You can see this by taking 1 inch square pieces of paper and taking any square number ( 2, 4, 16, etc) and making it into an array - it is a perfect square. If you take a number, which is not a square number, it cannot pysically form a square, no matter how you try.A cubed number is the same, it physically forms a cube.
A square array is an array in which the number of rows is the same as the number of columns.
It is an array with the same number of rows and columns.
A square array has the same number of columns and rows the array [1] is a square array (a trivial example) the array [1 0] [0 1] is a square array the array [1 0 0 0] [0 1 0 0] [0 0 1 0] [0 0 0 1] is a square array the array [1 0 0 0] [0 1 0 0] [0 0 1 0] is not a square array
2
for example 9 it is a square number beacause 3 multiplied by itself equals 9 and 3 by 3 in an array makes a square not a rectangle
It means indexing into an array. The array could be an array of built in primitive types or array of objects. The index must be a numeric value greater than or equal to 0.
5
4th
the length of the array
Yes, if it is described as such.
length
Yes, a unit array.