How is a two-dimensional array defined in the C language?

In the C language, the method of defining a two-dimensional array is as follows:

datatype arrayName[rowSize][colSize];

In this case, datatype represents the data type of the array elements, arrayName is the name of the array, and rowSize and colSize respectively indicate the number of rows and columns in a two-dimensional array. For example, defining a 3×4 integer two-dimensional array can be done as follows:

int arr[3][4];