{"id":57276,"date":"2019-05-31T16:00:20","date_gmt":"2019-05-31T10:30:20","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=57276"},"modified":"2021-05-14T17:46:19","modified_gmt":"2021-05-14T12:16:19","slug":"arrays-in-c-and-cpp","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/arrays-in-c-and-cpp\/","title":{"rendered":"Samurai Technique to Learn Arrays in C and C++ [Quiz included]"},"content":{"rendered":"

Arrays in C and C++ are a collection of similar data types that are accessed using a common name.<\/em> For a clear understanding, let’s consider a problem, where we want to store and display the salary of 10 employees in an organization. Before learning the concept of arrays, you would find this problem a tedious task and would probably come up with the solution:\u00a0“Declare 10 floating-type variables, each representing the salary of the 10 employees respectively, use scanf\/cin statement<\/strong> to store their respective values and printf\/cout statement<\/strong> to display it.”<\/p>\n

Now, what if the number of employees whose salary to be stored and displayed goes up to 100? It is practically not feasible to go by this conventional method.\u00a0The simple solution to this onerous problem is by the implementation of arrays. In a nutshell, arrays in C\/C++ are used when we have a large number of objects in hand. It proves to be quite helpful to manage data<\/em>.<\/p>\n

Make sure to test your learnings with interactive quizzes at the of article.<\/strong><\/em><\/p>\n

1. Arrays in C and C++<\/h2>\n

An array is a data structure, a sequential collection of similar data types that can easily be accessed using a common variable name. It is similar to the concept of a list in Python<\/strong> when talking about a single-dimensional array.\u00a0<\/em><\/p>\n

Arrays in C\/C++ can have multiple dimensions, starting from one-dimension to numerous. Dimensions are positive integral numbers. It cannot have a floating-type value.<\/p>\n

The trivial names of the various dimensions of arrays are as follows:<\/p>\n

    \n
  1. One-dimensional array – Vectors<\/li>\n
  2. Two-dimensional array – Matrix<\/li>\n<\/ol>\n

    An array is a generalized term when its dimension is unspecified.<\/p>\n

    2. Declaration of Arrays in C\/C++<\/h2>\n

    Arrays are declared in a similar fashion like any other variable of the same data type with addition to the use of square brackets, which is followed by the variable name.\u00a0As soon as an array is declared in C and C++, a block of memory is reserved for it<\/em>. The total size of an array is the product of the number of elements it has in its square bracket and the size of the data type it stores.<\/p>\n

    When an array is multidimensional, let\u2019s say:<\/p>\n

    data_type array_name [order-1] [order-2] [order-3]……….[order-n]<\/strong><\/p>\n

    The total size occupied by the array would be:<\/p>\n

    (Number of bytes occupied by\u00a0data_type) x (order-1 x order-2 x order-3 x \u2026\u2026\u2026.order-n)<\/strong><\/p>\n

    Once the orders of the array are specified, it cannot be changed. In other words, the size of an array remains constant which is used in static memory allocation i.e. it is not dynamic in nature.<\/p>\n

    Syntax of Arrays<\/h5>\n

    data_type array_name [ size ];<\/strong><\/em><\/p>\n

    For example- float marks [10];<\/p>\n

    3. Data Type of an Array<\/h2>\n

    An array can have any data type like int, float, char but there are 2 exceptions in the C language which do not support arrays. They are:<\/p>\n