Accessing elements in Three-Dimensional Array in C Accessing elements in 3D Arrays is also similar to that of 2D Arrays. The difference is we have to use three loops instead of two loops for one additional dimension in 3D Arrays.

This is called traversing the array. Just start the index at 0 and loop while the index is less than the length of the array. Note that the variable i (short for index) is often used in loops as the loop counter variable and is used here to access each element of an array with its index.