Arrays are special variables which can hold more than one value under the same variable name, organised with an index. Arrays are defined using a very straightforward syntax:
/* defines an array of 10 integers */ int numbers;
Accessing a number from the array is done using the same syntax. Notice that arrays in C are zero-based, which means that if we defined an array of size 10, then the array cells 0 through 9 (inclusive) are defined.
numbers is not an actual value.
int numbers; /* populate the array */ numbers = 10; numbers = 20; numbers = 30; numbers = 40; numbers = 50; numbers = 60; numbers = 70; /* print the 7th number from the array, which has an index of 6 */ printf("The 7th number in the array is %d", numbers);
Arrays can only have one type of variable, because they are implemented as a sequence of values in the computer’s memory. Because of that, accessing a specific array cell is very efficient.
- Define an int array which includes 10 numbers.