It is a branch of Mathematics that study the arrangement of n×n rows and columns.Also,Introduction to Matrices is the arrangement of numbers with n×n rows & columns . It is an arrangement of numbers into rows and columns.
A matrix is a collection of numbers into a fixed number of rows and columns. Usually the numbers are real numbers. They have applications not only in Mathematics but also in fields such as physics, Computer research, etc.
There are various kinds of matrices. The matrix with only one row is a row matrix. Whereas, matrix with only one column is a column matrix. There are various types for instance, Hermitian , orthogonal matrix, etc..