One dimensional array:

 A one-dimensional array  is a structured collection of elements  that can be accessed individually by specifying the position of a component with  index/ subscript  value. The index would let us refer to the corresponding value. value at that .   Like a regular variable, an array must be declared before it is used. A typical declaration for an array in C++ is:  type name [elements];  where type is a valid data type (like int, float...), name is a valid identifier  or variable name and the elements field (which is always enclosed in square brackets []), specifies how many of these elements the array will contain. Therefore, in order to declare an array named as marks, that will store marks for 5 students,