Functions & arrays

• If you passed an array by value, it would require a lot of local memory and a long process to copy all the values from the array to the local array.

• So, arrays are always passed by reference. This means a pointer to the array is passed by value.

• Inside the function, you can use this pointer just like it is an array.

• Changes inside are done to external array.

• There is only one copy of the entire array.