• The variables we have used can only store one value .

  • int grade;             //declares a single variable, named grade, of type int

• What if we need to store the grades of 30 students , or more over for 1000 students ? should we declare 1000 variable ?

• Here comes the usage of what we called the array.

• A one dimensional array (single dimensional) is a list of values of the same data type ( variable that can hold more than one value) .

• The items in the list can be declared as a single unit , and stored under a common variable name called array name.

  • int grades[30];     //declares an array, named grades, consisting of 30 elements, each of type int

• Each array has sufficient memory reserved for it to hold the number of data items given in the declaration statement .

Examples:

    char code[4];     // an array of 4 characters code

    int grades[5];     // an array of 5 integers grades

code array with enough storage for 4 characters ( 4 bytes )

grades array with enough storage for 5 integers ( 10 bytes )