How do you initialize a 2D array in C?

Sure, here is how you can initialize a 2D array in C:

1. First, you need to declare the array with its dimensions. For example, if you want to create a 2D array with 3 rows and 4 columns, you would write:

int array[3][4];

2. Next, you can initialize the array at the time of declaration. Here's how you can do it:

int array[3][4] = {
  {1, 2, 3, 4},
  {5, 6, 7, 8},
  {9, 10, 11, 12}
};

In this example, the numbers 1-12 are the elements of the array. The outer braces {} enclose the elements of the array, and the inner braces {} enclose the elements of each row.

3. If you don't want to initialize the array at the time of declaration, you can do it later in your code. Here's how:

int array[3][4];

array[0][0] = 1;
array[0][1] = 2;
array[0][2] = 3;
array[0][3] = 4;
array[1][0] = 5;
array[1][1] = 6;
array[1][2] = 7;
array[1][3] = 8;
array[2][0] = 9;
array[2][1] = 10;
array[2][2] = 11;
array[2][3] = 12;

In this example, array[i][j] represents the element at the ith row and jth column. The first index represents the row number and the second index represents the column number.