1. An array must be declared with type of variable or data type
  2. An array contains same type of data
    e.g. – int a [10]
  3. The name of array cannot be same as that of any other variable within the function.
  4. The size of array is specified using sub-script notation (index)
  5. THE sub-script indicates that how many elements are to be allocated to an array.
  6. A sub-script used to declare an array is called dimension