What is Array?
An array in C or C++ is a collection of items stored at  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable memory  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable and elements can be accessed  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable using  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable of an array. They are used to  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable similar type of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable as in the data type must be the same for all elements. They can be used to store collection of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable data types such as int,  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable, double, char, etc of any  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable type. To add to it, an array in C or C++ can store  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable data types such as the  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable, pointers etc. Given below is the  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable representation of an array.

Why do we need arrays?
We can use  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable variables (v1, v2, v3, ..) when we have a  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable number of objects, but if we want to store a  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable number of instances, it  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable difficult to manage them with  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable variables. The idea of an array is to  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable many instances in one  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable.

What are the advantages of an Array in C?
 2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable access of elements using array  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable.
Use of less line of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable as it creates a single  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable of multiple elements.
Easy  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable to all the elements.
 2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable through the  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable becomes easy using a  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable loop.
 2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable becomes easy as it can be  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable by writing less line of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable.

What are the disadvantage of an Array in C?
Allows a  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable number of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable to be entered which is decided at the time of  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable. Unlike a linked list, an  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable in C is not  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable.
 2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable and  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable of elements can be costly since the  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable are needed to be managed in accordance with the new  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable allocation.

Difference between pointer and array in C?
Arrays and  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable are two  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable things (we can check by applying sizeof). The confusion happens because  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable name indicates the  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable of first element and  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable are always passed as  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable (even if we use square bracket).

What is 2D array?
We can have multidimensional arrays in C like  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable and 3D array. However the most popular and frequently used  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable is 2D – two  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable array. In this post you will learn how to  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable, read and write  2DaccessaccomplishedaddressarrayarraysbecomescodecontiguousdatadeclarationdeclaredeletionderiveddifferentdimensionaldynamicelementsfixedfloatindexindicesInsertionlargelocationsmemorynormalparticularpicturesquepointerpointersprimitiveRandomrandomlyrepresentsinglesmallSortingstorestructuresTraversalvariable in 2D array along with various other features of it.