//This code declares 3 separate variable, //each has its own location in memory int num1 = 3; int num2 = 5; int num3 = 7; //Instead you could declare num to be an array with a size of 3: int[] num = { 3, 5, 7 }; //If you want to change one of the values in an array, you must use the index: num[0] = 12; num[2] = 9; //Instead of a consant as the index, you can use a variable: int i = 1; num[i] = 33; //This is very powerful; you can use a loop to process an array: //Set all the elements of num to 0: for(int i=0;i<num.Length;i++) { num[i] = 0; }
