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In this video we are talking about:

• What is an Array?
• Initializing an Array.
• Accessing the value of an Array.
• Character Sequence or Character Array.

What is an Array?

• A Way of storing multiple values in only one identifier.
• If you have three different int values stored in an int array, then it can be represented as:

• Index:	0	1	2
  Values:	Value1	Value2	Value3

Declaring an array.

• An array of integer named MyArray to store 3 values can be declared as:

  • int MyArray[3]

• Basic syntax would be: 

  • type Identifier[Number of Elements]

Initializing an array

• When declaring an array in local scope, like in a function, without specifying a value, each element in the array will have an undetermined value, where as global and static array of fundamental data types will be initialized to 0.
• To assign a value while declaring, you have enclose the values in { } and separate by a comma. 
• For Example:

  • int MyArray[3] = {7, 256, 1024}

Accessing the value:

• Each value in the array can be accessed to read and write by calling the array variable in following format:

  • ArrayName[Index]

• Example:

  • int MyArray[7] = {7, 256, 1024, 77, 88, 12};
    MyArray[6] = 100;
    int X = MyArray[5];

Character Sequence:

• Strings data types are just a sequence of characters, so char array and strings are interchangeable.
• Char sequence should end with null character '\\0'

Have a look at the sample program Array.cc which can be downloaded from below:

Resource files:

• C++ Programming tutorial: Compound Data Types: Array (pptx)
• C++ Programming tutorial: Compound DataTypes: Array (pdf)
• Sample Program:  Array.cc

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